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

Beyond the non-readonly, non-idempotent annotations, it discloses the mutation semantics that actually matter: the claim_token must be retained, claims expire after `minutes` (default 120, crash-safe), re-claiming extends rather than duplicates, and a foreign claim is refused. This is exactly the extra context annotations cannot carry.

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?

Front-loaded with the purpose and the primary parameter, then ordered by workflow step (claim → extend → release → finish). Minor waste in the duplicated 'Free.' / 'Free to call.' tail, which is the only reason it falls short of 5.

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 six-parameter stateful mutation with no output schema, it still covers the return value ('task', or null when nothing is open), the token lifecycle, and the failure mode. Nothing an agent needs in order to call it correctly is missing.

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 coverage is already 100%, so the baseline is 3, but the description adds genuine meaning: omitting `id` selects the oldest open task, `claim_token` is required to extend or release despite matching `agent` names, and `minutes` governs expiry rather than being a mere timeout. It does not restate types, only intent.

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 gives a specific verb and resource ('Take a task') plus the reason for doing so (preventing duplicate work), and it explicitly separates itself from siblings by naming retire_entry as the completion step. An agent can distinguish it from record_entry/retire_entry without opening a schema.

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?

It spells out when to call it (before starting work), what to pass or omit (id vs. oldest open task), how to extend, how to undo via release=true, and where to go when finished (retire_entry). The already_claimed refusal case and the 'your own name is not enough' caveat close the obvious ambiguity.

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