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

Annotations declare idempotentHint=true, readOnlyHint=false, destructiveHint=false. The description adds valuable context beyond that: it introduces the concept of a lease_token that must be used to submit or release before expiry, which is critical operational information. It doesn't mention permissions or rate limits, but the lease concept is well conveyed.

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?

Two short sentences, front-loaded with the core action, then the critical follow-up instruction about the lease_token. No wasted words.

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 no output schema, the description covers the key action and the important lease_token responsibility. It could specify what happens if the lease expires or how to obtain a lease_token, but for a simple claim operation, it is mostly complete.

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 50%. The description does not mention any parameters; it assumes study_id and agent_key are known. The schema itself describes agent_key with a description. The description adds no parameter meaning beyond what's in the schema, so baseline 3 is appropriate.

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 clearly states the action: 'Accept one funded place.' This is a specific verb (accept) and resource (funded place), distinguishing it from siblings like release_run or submit_result. However, it could be more explicit about what a 'run' is in this context (a study run), though the title 'Claim a study' and sibling tools imply it.

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?

Usage is implied: use this to claim a spot. The description mentions keeping the lease_token to submit or release, which hints at the lifecycle, but it doesn't explicitly say when to use this tool versus alternatives like get_run or next_task. No explicit when-not-to-use or prerequisites are stated.

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