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

With no annotations, the description carries the full burden, and it does disclose one real behavioral constraint: only the claiming agent owns state transitions until completion/cancellation. However, it says nothing about what happens to unspecified fields, whether metadata is merged or replaced, permission errors, or whether transitions are validated against the current state.

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 action and followed by the governing rule, with no filler. It is perhaps terse for a six-parameter mutation tool, but nothing in the text is wasted.

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 mutation tool with no annotations, no output schema, six undocumented parameters, an enum state field, and a nested metadata object, the description leaves far too much unspecified. It establishes purpose and ownership but not the mechanics an agent needs to call it 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% across six parameters, and the description names none of them. 'State transitions' loosely gestures at the 'state' enum and 'completion or cancellation' at two of its values, but workId, agentId, dueAt, blockedReason, and the nested metadata object are entirely unexplained in both the schema and the description.

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?

States a specific verb+resource ('Update a claimed work item') and scopes it to items already claimed, which cleanly separates it from work_claim, work_create, and work_list. It does not name those siblings explicitly, so an agent must infer the boundary from the 'claimed' qualifier.

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 'as it progresses' plus 'The claiming agent controls state transitions' implies when the tool applies and who may call it, but there is no explicit when-not guidance or named alternative. An agent can infer the intended lifecycle position but is not told what to do instead for unclaimed items.

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