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

Annotations declare readOnlyHint=false, destructiveHint=false, idempotentHint=true, and openWorldHint=false, but the description adds little beyond them. It does state that 'the server stores only bounded metadata and an attested outcome,' which is a useful privacy/storage constraint, but it does not explain what side effects occur on the local agent, whether the action is asynchronous, or what 'attested outcome' means. For a mutating relay operation, this is insufficient behavioral disclosure.

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 short and front-loaded, but it is under-specified rather than concise. The phrase 'relay execute local action' is redundant with the tool name, and the one useful clause about bounded metadata is buried at the end. It earns a 3 because it is brief and readable, but it does not use its brevity to convey meaningful information.

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 six parameters, no output schema, and a mutating relay operation, the description is incomplete. It does not explain the return value, the meaning of the idempotency key, the role of handoffId/sessionId/executionId, or how this relates to the relay_* workflow. The bounded-metadata note is the only contextual value, and it is not enough for an agent to invoke this tool correctly.

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?

Schema description coverage is 0%, so the description must compensate, but it does not explain any of the six parameters. The required projectId and idempotencyKey are not described, and the optional details, handoffId, sessionId, and executionId are left entirely to the schema. The description adds no semantic meaning beyond the raw schema.

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 'Request the connected local agent to relay execute local action' is largely tautological, restating the tool name without defining what 'relay execute local action' actually means or what the tool accomplishes. It does not specify a clear verb+resource or distinguish this from the many relay_* siblings (relay_accept, relay_poll, relay_status, etc.).

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?

No guidance is given on when to use this tool versus alternatives. The description does not mention the relay_* sibling family, idempotency usage, or any conditions that would select this tool over relay_poll/relay_status/relay_sync_completion. The only contextual hint is the idempotentHint annotation, but the description itself provides no usage direction.

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