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MCP Selection Lab

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io.github.ChanghuLiu/mcp-selection-labv0.5.2

Benchmark MCP tool selection with metadata-only routing, collision, abstention, and holdout checks.

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Call this server's tools from your browser. Nothing to install.

https://agenttrustlab.com/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

get_selection_report Read-only

Read and agent-enrich an existing public scan report by id; no new target request or model call.

report_idstring, required

Tools (3)

get_selection_report

Read and agent-enrich an existing public scan report by id; no new target request or model call.

MCP Selection Lab MCP server | mcptry

Argument	Type	Description
report_id*	string

Input schema (JSON)

{
  "type": "object",
  "title": "get_selection_reportArguments",
  "required": [
    "report_id"
  ],
  "properties": {
    "report_id": {
      "type": "string",
      "title": "Report Id",
      "pattern": "^[0-9a-f]{16}$"
    }
  }
}

scan_mcp_metadata

Create a free public report of MCP tool-description routing collisions. Reads discovery metadata (initialize/tools/list) only; never calls target business tools or spends funds. Use a public HTTP(S) URL without credentials, query or fragment. Results use at most 12 tools and 24 generated cases, not a real-model evaluation. The returned report is enriched with agent_plan candidate description-only edits and a machine-readable rerun instruction. Candidate edits are not untouched-holdout proof. Reports persist and are public by link. For an existing report use get_selection_report. Set internal_test=true for owner/CI validation so it is excluded from public scans. source is a self-reported referral bucket, not identity verification.

Argument	Type	Description
source	string
mcp_url*	string
internal_test	boolean

Input schema (JSON)

{
  "type": "object",
  "title": "scan_mcp_metadataArguments",
  "required": [
    "mcp_url"
  ],
  "properties": {
    "source": {
      "type": "string",
      "title": "Source",
      "default": "other",
      "maxLength": 32
    },
    "mcp_url": {
      "type": "string",
      "title": "Mcp Url",
      "maxLength": 2048,
      "minLength": 8
    },
    "internal_test": {
      "type": "boolean",
      "title": "Internal Test",
      "default": false
    }
  }
}