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

Annotations already declare destructiveHint=true, openWorldHint=true, and idempotent=false. The description adds that it emails the Principal (consistent with openWorld) but doesn't explain the destructive aspect, e.g., whether the previous link is invalidated, nor any rate limits. Reasonable given annotations, but leaves meaningful gaps.

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?

Single efficient sentence, front-loaded with the action. Zero filler.

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?

No output schema, one well-documented param, and rich annotations; the description covers who/what/why. Complete enough for calling it correctly, though the consequences of the destructive resend could be clearer.

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?

Only one optional parameter with 100% schema coverage, so the schema fully documents it. The description adds no meaning beyond the schema. Baseline 3 applies when coverage is high.

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 action (email another claim link) and resource (claim link to the sandbox), which is distinct from every sibling tool. It's clear what happens, though the framing "or to confirm you" is slightly ambiguous.

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?

Gives a clear triggering condition ("when the first was lost"), which tells the agent when to use it. It doesn't name alternatives or explain when not to resend, but the context is clear.

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