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

Annotations declare this is a non-destructive, idempotent, non-read-only mutation; the description adds real context beyond that: a 15-minute exclusive lock and the fact that re-claiming extends the lease. It still doesn't say what happens if another agent already holds the claim, or what the call returns/errors on conflict.

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?

One sentence, front-loaded with the core action and followed by the lock semantics. No filler, no restatement of the title.

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 lease-granting mutation with no output schema, the description covers the essentials of ownership and duration but omits conflict behavior and return value. An agent can call it, but cannot fully predict the outcome when the claim is contested.

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 50%: 'workspace' is documented in the schema, while 'id' is bare. The description implies 'id' identifies the fix request being claimed, which is a small but genuine clarification; it adds nothing about the workspace override or id format.

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 ('assigns a fix request') plus the exclusivity effect ('so no other agent works on it'), which clearly separates it from read-only siblings like fix_status and fixes. It never names an alternative tool outright, so sibling differentiation is implied rather than explicit.

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 description implies when to use it (before working on a fix, to take exclusive ownership) and mentions re-claiming to extend. It gives no guidance on when NOT to use it, nor how it relates to fix, fixes, fix_status or report_fix.

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