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

The description discloses the ownership transfer condition (client must log in and accept claim) which is not implied by annotations. It also notes that generation is started. This adds value beyond the annotations (readOnlyHint false, destructiveHint false), though it doesn't cover all side effects like rate limits or failure cases.

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 sentences, efficient and front-loaded with the critical 'Agency mode only' restriction. The ownership transfer condition is important and clearly stated. No filler or redundancy.

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?

With 8 parameters and no output schema, the description should explain what the tool returns (e.g., claim link URL) and any failure modes. It doesn't. The ownership transfer logic is explained, but the agent is left guessing about the return value. Given the complexity, this is a gap.

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 100%, so the schema fully documents parameters. The description adds relevant context about ownership transfer (client_email) and the claim link process, slightly enhancing meaning. However, it doesn't explain parameter syntax or relationships beyond that, so 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 states a specific verb ('create'), a specific resource ('a new app'), and the additional actions (start generation, create claim link). It clearly distinguishes from siblings like create_app (which likely lacks the claim link) and agency_create_claim_link (which is only the link).

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 explicitly restricts usage to 'Agency mode only', which is a clear prerequisite. However, it doesn't mention when to use this combined tool instead of the separate agency_create_claim_link or create_app, leaving some inference to the agent. Still, the context is helpful.

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