Get A2A Agent

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

Annotations (readOnlyHint, idempotentHint, destructiveHint) already cover the safety profile, so the description only needs to add extra behavioral context. It does not disclose error behavior, return shape, or other implementation details beyond 'registered'. The description largely restates the tool's name and schema, offering minimal added value.

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 a single, front-loaded sentence of 8 words: 'Fetch a registered A2A agent record by id.' It conveys the action, resource, and scope with zero waste.

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?

For a simple read-only getter with one fully documented parameter and comprehensive annotations, the description is nearly complete. It states the resource and lookup key, and 'record' implies the full agent object, distinguishing it from card getters. However, the lack of an output schema and any mention of return format or error conditions prevents a perfect score.

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 schema already documents the only parameter 'agent_id' with a clear description ('The A2A agent id'), and schema description coverage is 100%. The tool description adds no new meaning beyond confirming the lookup is by id, so the baseline 3 applies.

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 uses a specific verb 'Fetch' and identifies the resource as 'a registered A2A agent record' accessed by id. This clearly distinguishes it from sibling tools like list, create, update, delete, and even the card getter 'get_a2a_agent_card'.

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 phrase 'by id' implies the tool is for fetching a specific agent when its id is known, but it does not explicitly state when to use it instead of alternatives like lyzr_list_a2a_agents or lyzr_get_a2a_agent_card. No exclusions or alternative guidance is provided; usage context is implied rather than stated.

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