start_homedata_signup

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

Since no annotations are provided, the description carries full burden. It discloses the tool returns a signup URL and steps, and that it does not have destructive effects. It is transparent about the signup process and prerequisites, though it could mention that the tool itself does not modify any data.

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?

The description is well-structured with three concise paragraphs: purpose, background, and next steps. It is front-loaded with the core action. Minor reduction possible, but overall efficient and clear.

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?

Given the tool's low complexity (one optional parameter, no required parameters, and an output schema not shown but described), the description covers all necessary aspects: purpose, context, output, and post-usage steps. It is fully complete for an agent to use 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?

The schema already covers 100% of parameters with a description for 'email' (optional). The tool description adds value by explaining that if provided, it helps the user know which inbox to check for verification, which enriches the schema's default 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?

The description clearly states the tool 'Begin a Homedata signup' and explains it helps the user get an API key for UK property data. This is distinct from the sibling tools which are data lookups, so purpose is unambiguous and differentiated.

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 explains when to use the tool (to start signing up for a Homedata API key) and provides next steps (email verification, setting environment variable). However, it does not explicitly state when not to use it, though the sibling context makes that clear.

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