get_plugin_registry

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

Annotations already provide readOnlyHint=true and idempotentHint=true. The description reinforces this with 'Read-only' and adds the output structure '{ languagePlugins, frameworkPlugins, edgeTypes }', which goes beyond what annotations provide. No contradictions.

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

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

The description is two sentences, with the first sentence providing the core action and output, and the second sentence adding usage guidance and return structure. Every word earns its place; no fluff.

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

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

Given zero parameters and rich annotations, the description is complete. It explains what the tool does, when to use it, and what output to expect. No gaps remain.

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

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

The input schema has zero parameters, so schema description coverage is effectively 100%. The description adds meaning by specifying the return structure, which is entirely appropriate and helpful.

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

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

The description starts with 'List all registered indexer plugins and the edge types they emit.' This is a clear verb+resource combination. The tool is uniquely identified among many 'get_' sibling tools by focusing on the plugin registry, and the use cases for debugging and understanding frameworks further clarify its purpose.

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

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

The description explicitly states usage contexts: 'Use for debugging indexer behavior or understanding which frameworks are supported.' While it does not mention when not to use or name alternatives, the provided guidance is clear and sufficient for a read-only informational tool with no similar siblings.

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