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Agent Repair — MCP Tool Failure Diagnostics

ecosystem_catalog

Discover useful independent agent-native tools from this same project and their MCP connection URLs. No request to another service, referrals only when relevant.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "ecosystem_catalog"
  }
}

Input Schema

NameRequiredDescriptionDefault
needNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations supplied, the description does disclose one meaningful trait: "No request to another service," implying the results are local and no external call is made. It says nothing about read-only safety, whether it returns live endpoints or static metadata, or how many entries come back.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short sentences with the core capability front-loaded and no padding. The second sentence is terse to the point of being cryptic, but nothing is wasted.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-required-parameter tool with no output schema and no annotations, the description covers the basic purpose but leaves the sole parameter and the returned shape unexplained. An agent could call it with no arguments, yet would be guessing about which "need" value to pass.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% and there is one optional enum parameter, "need," which the description never mentions. The six enum values (diagnose_failure, validate_arguments, audit_contracts, inspect_demo_health, dependency_risk, all) are suggestive but unexplained, and the description adds no meaning about what selecting each value changes.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

"Discover useful independent agent-native tools from this same project and their MCP connection URLs" states a specific verb (discover) and a specific resource (agent-native tools plus connection URLs). It is clearly distinct from the sibling tools diagnose_tool_failure and validate_tool_arguments, which act on a tool rather than cataloging peers.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The only guidance is "referrals only when relevant," which gives no concrete condition, trigger, or alternative for deciding when to call this instead of the diagnose/validate siblings. The agent must infer the use case from the enum values in the schema rather than from the description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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