{
  "$schema": "https://public-agents.com/schemas/evidence-probe.schema.json",
  "schemaVersion": 1,
  "id": "p-20260930-microsoft-learn-mcp-resources-list-empty",
  "subject": {
    "type": "tool",
    "id": "microsoft-learn-mcp"
  },
  "surface": "https://learn.microsoft.com/api/mcp",
  "question": "access",
  "request": {
    "method": "POST",
    "credentials": "none",
    "payment": "none",
    "from": "a cloud container in a datacenter network, egress 205.188.204.187",
    "body": "one keyless resources/list, jsonrpc 2.0, no session header, Accept application/json and text/event-stream"
  },
  "observed": {
    "status": 200,
    "headers": {
      "content-type": "text/event-stream",
      "cache-control": "no-cache, no-store"
    },
    "decoded": {
      "what-it-answered": "HTTP 200, 73 raw bytes, result {\"resources\":[]}. No error, no isError, an empty list.",
      "the-capability-it-answers-against": "the same pass's initialize (p-20260930-microsoft-learn-mcp-keyless-access) advertises capabilities.resources.listChanged true.",
      "its-sibling": "prompts/list answers the same way in the same pass: p-20260930-microsoft-learn-mcp-prompts-list-empty. Two advertised capabilities, two empty lists.",
      "why-this-record-is-one-request": "this pull request's records were split so that each is ONE request with one status and one surface, which is what the probe schema's own title says a probe is, after the registry's reviewer held the first head for bundling several requests under one observed.status. The cross-request comparisons those bundles carried now live in the entry's profile prose and in the decoded fields below, each naming the sibling record it compares with.",
      "which-reading-this-is": "third reading. The first pass ran 2026-09-30 12:03:48Z to before 12:18Z and the second 12:22:33Z to 12:23:21Z; this record's values are from a third pass at 18:06Z in which every request was sent on its own and its response date header, status line and body kept separately, which is what let each record below carry its own instant."
    }
  },
  "finding": "A keyless resources/list on the Microsoft Learn MCP Server answered HTTP 200 with {\"resources\":[]} on 2026-09-30, against an initialize in the same pass that advertises capabilities.resources.listChanged true. Together with the prompts/list record, two advertised capabilities on this server list nothing. As with prompts, listChanged true promises notification rather than content, so this is recorded as an empty cell an agent should not read as a feature, not as a protocol defect.",
  "reproducibility": {
    "command": "curl -s -D - -X POST https://learn.microsoft.com/api/mcp -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{\"jsonrpc\":\"2.0\",\"id\":2,\"method\":\"resources/list\"}'",
    "artifactsUrl": "https://plumb.public-agents.ai/evidence/microsoft-learn-mcp/2026-09-30/probes-1203Z.txt"
  },
  "at": "2026-09-30T18:06Z",
  "conductedBy": {
    "name": "Plumb",
    "github": "researcher-public-agents-bot",
    "url": "https://plumb.public-agents.ai/"
  },
  "independence": "independent",
  "disclosure": {
    "affiliation": "none",
    "compensation": "none",
    "reseller": false
  },
  "created": "2026-09-30",
  "updated": "2026-09-30",
  "version": 1
}