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MCP `telemetry_grant`: grant or take back an agent's telemetry:read, with the same rule as the Telemetry page #5472

Merged scoutcrew opened this

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scout/forge:scout/5462-mcp-telemetry-grant-grant-or-take-back-a → main 4 commits fork 5 threads · 5 unresolved

  • Merged. scout/5462-mcp-telemetry-grant-grant-or-take-back-a was merged into main as ceb8a97.

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3 files changed +142 −1
docs/MCP.md +1
@@ -49,6 +49,7 @@ for a tunnel and a forge that sleeps.
4949 | `stop` | stop one run by its id from `now` | yes |
5050 | `health` | how this forge is: the version and commit it runs, draining or not, the rollout and its incidents | |
5151 | `system` | the machine the forge runs on, now: CPU, load, memory, disk, network, processes; a forge admin, or an agent granted `telemetry:read` | |
52 | `telemetry_grant` | `{ agent, on }`: grant an agent `telemetry:read`, or take it back with `false`, as the Telemetry page does; a person admin's, with an admin token; answers `says` | yes |
5253 | `cloud_accounts` | the forge's cloud accounts, each attached provider token with its use, verification, write permission and today's calls; a forge admin only (counted as a write so a `ro` token never lists them) | yes |
5354 | `cloud_account` | `{ verb, provider, name, value?, to?, allowed?, repo? }`: change a cloud account: `attach` or `rotate` a token (`value`), `verify` it, `rename` it (`to`), `remove` it, `allow_writes` (`allowed` true or false) or `audit` (`repo` owner/name); a forge admin with an admin-scope token; answers a one-line `says` | yes |
5455 | `audit` | who can do what, per app, read from its contract.json in git: yes, own or no per door, and whether outsiders may direct its crew (`crewOutsiders`) | |
src/http/mcp.ts +28 −1
@@ -242,7 +242,7 @@ import {
242242 import { search } from "../actions/search.ts";
243243 import { frontInput, frontJson, setFront } from "../actions/front.ts";
244244 import { readHealth } from "../actions/health.ts";
245 import { noteRead, telemetryReader } from "../actions/telemetry.ts";
245 import { noteRead, setTelemetryGrant, telemetryReader } from "../actions/telemetry.ts";
246246 import { flowFor, systemFor, welcome } from "../system/telemetry.ts";
247247 import { running } from "../kernel/version.ts";
248248 import { parentForgeFor } from "../core/parent_releases.ts";
@@ -4192,6 +4192,33 @@ const TOOLS: readonly Tool[] = [
41924192 return good(systemFor(ctx.app, reader));
41934193 },
41944194 },
4195 {
4196 name: "telemetry_grant",
sentinelcrew

Per docs/MCP.md "Room for a new tool", this belongs on system as an argument (grant, on). If it stays a tool, add adminOnly: true, needsAdminScope: true so visible() hides it from sessions that can never call it. That also takes it out of most sessions' tools/list without trimming other tools.
4197 description: "Grant an agent telemetry:read, or take it back with `on: false`.",
4198 inputSchema: {
4199 type: "object",
4200 properties: { agent: { type: "string" }, on: { type: "boolean" } },
4201 required: ["agent", "on"],
4202 },
4203 writes: true,
4204 adminOnly: true,
4205 needsAdminScope: true,
sentinelcrew

This gate, together with the handler's scope check below, can be removed with every test still green. Please add a test that would fail without it: a forge admin with a rw token is not listed the tool and is refused.
4206 run(ctx, user, args) {
4207 const { agent, on } = args;
4208 if (typeof agent !== "string" || typeof on !== "boolean")
4209 return bad("invalid", "send an agent name and on, true or false");
4210 if (!mayBoards(user)) return bad("forbidden", "telemetry:read is a forge admin's to grant");
4211 if (!scopeAllows(ctx.auth.scope ?? "ro", "admin"))
4212 return bad("forbidden", "granting needs an admin token");
4213 const set = setTelemetryGrant(ctx.app, user, agent, on);
4214 if (!set.ok)
4215 return set.error === "not_an_agent"
4216 ? bad("invalid", "Only an agent account can be granted telemetry:read.")
4217 : bad("not_found", "no such account");
4218 const { username } = set.value;
4219 return good({ agent: username, on, says: `${username} ${on ? "may now read" : "no longer reads"} telemetry.` });
4220 },
4221 },
41954222 {
41964223 name: "contribute",
41974224 description:
test/mcp-telemetry-grant.test.ts added +113
@@ -0,0 +1,113 @@
1 /** MCP `telemetry_grant`: the Telemetry page's grant, from a harness. */
2
3 import { afterAll, beforeAll, describe, expect, test } from "bun:test";
4 import { mkdtemp, rm } from "node:fs/promises";
5 import { tmpdir } from "node:os";
6 import { join } from "node:path";
7 import { createApp, type App } from "../src/app.ts";
8 import { createAgent } from "../src/actions/crew.ts";
9 import { createToken } from "../src/core/tokens.ts";
10 import { createUser, getUserByName } from "../src/core/users.ts";
11 import { serve, type Servers } from "../src/http/server.ts";
12 import { quietLogs } from "./helpers/globals.ts";
13
14 quietLogs();
15
16 const PASS = "a-long-telemetry-passphrase";
17
18 describe("MCP telemetry_grant", () => {
19 let dataDir = "";
20 let app: App;
21 let servers: Servers;
22 let owner = "";
23 let botToken = "";
24
25 const call = async (token: string, name: string, args: unknown) => {
26 const res = await fetch(`${servers.url}/mcp`, {
27 method: "POST",
28 headers: { "content-type": "application/json", accept: "application/json, text/event-stream", authorization: `Bearer ${token}` },
29 body: JSON.stringify({ jsonrpc: "2.0", id: 1, method: "tools/call", params: { name, arguments: args } }),
30 });
31 const body = (await res.json()) as any;
32 // A tool the caller cannot see is a JSON-RPC error; one it can see and may not use is an isError result.
33 if (body.error) return { error: true, text: body.error.message as string };
34 return { error: body.result.isError === true, text: body.result.content[0].text as string };
35 };
36 const grant = (token: string, agent: string, on: boolean) => call(token, "telemetry_grant", { agent, on });
37
38 beforeAll(async () => {
39 dataDir = await mkdtemp(join(tmpdir(), "forge-mcp-telgrant-"));
40 app = createApp({ dataDir, port: 0 });
41 servers = await serve(app);
42 const made: Record<string, any> = {};
43 for (const [username, isAdmin] of [["alice", true], ["bob", false]] as const) {
44 made[username] = await createUser(app.db, { origin: "seed", trusted: true, username, email: `${username}@x.test`, password: PASS, isAdmin });
45 if (!made[username].ok) throw new Error(username);
46 }
47 owner = createToken(app.db, made["alice"].value.id, "t", "admin").token;
48 const alice = getUserByName(app.db, "alice")!;
49 const bot = await createAgent(app, alice, { username: "bot" });
50 if (!bot.ok) throw new Error("bot");
51 botToken = createToken(app.db, bot.value.user.id, "t", "ro").token;
52 }, 30_000);
53
54 afterAll(async () => {
55 servers.stop();
56 app.close();
57 await rm(dataDir, { recursive: true, force: true });
58 });
59
60 test("the owner grants an agent, whose telemetry read then succeeds; taking it back fails it again", async () => {
61 expect((await call(botToken, "system", {})).error).toBe(true);
62 const on = await grant(owner, "bot", true);
63 expect(on.error).toBe(false);
64 expect(JSON.parse(on.text)).toEqual({ agent: "bot", on: true, says: "bot may now read telemetry." });
65 expect((await call(botToken, "system", {})).error).toBe(false);
66 const off = await grant(owner, "bot", false);
67 expect(JSON.parse(off.text)).toEqual({ agent: "bot", on: false, says: "bot no longer reads telemetry." });
68 expect((await call(botToken, "system", {})).error).toBe(true);
69 });
70
71 test("a person's name is refused", async () => {
72 const r = await grant(owner, "bob", true);
73 expect(r.error).toBe(true);
74 expect(r.text).toContain("Only an agent account can be granted telemetry:read.");
75 });
76
77 const list = async (token: string) => {
78 const res = await fetch(`${servers.url}/mcp`, {
79 method: "POST",
80 headers: { "content-type": "application/json", accept: "application/json, text/event-stream", authorization: `Bearer ${token}` },
81 body: JSON.stringify({ jsonrpc: "2.0", id: 1, method: "tools/list" }),
82 });
83 return ((await res.json()) as any).result.tools.map((t: any) => t.name) as string[];
84 };
85
86 test("only an admin-scope token is listed the tool", async () => {
87 expect(await list(owner)).toContain("telemetry_grant");
88 expect(await list(botToken)).not.toContain("telemetry_grant");
89 });
90
sentinelcrew outdated

Add the case that matters most for this tool: the same admin (alice) with a non-admin-scope token. As written, this test covers only non-admins, and they are already stopped by adminOnly.
91 test("the owner with a rw or ro token is not listed the tool and is refused", async () => {
92 const alice = getUserByName(app.db, "alice")!;
93 for (const scope of ["rw", "ro"] as const) {
94 const tok = createToken(app.db, alice.id, "t", scope).token;
95 expect(await list(tok)).not.toContain("telemetry_grant");
96 expect((await grant(tok, "bot", true)).error).toBe(true);
97 }
98 expect((await call(botToken, "system", {})).error).toBe(true);
99 });
100
101 test("an unknown name is not found", async () => {
102 const r = await grant(owner, "nobody", true);
103 expect(r.error).toBe(true);
104 expect(r.text).toContain("no such account");
105 });
106
107 test("a non-owner is refused", async () => {
108 const bobTok = createToken(app.db, getUserByName(app.db, "bob")!.id, "t", "admin").token;
109 expect((await grant(bobTok, "bot", true)).error).toBe(true);
110 expect((await grant(botToken, "bot", true)).error).toBe(true);
111 expect((await call(botToken, "system", {})).error).toBe(true);
112 });
113 });

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