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

Adds important behavioral detail beyond the annotations: the production build runs in the background, the tool returns 'building' immediately, and status must be checked separately. The 'Free accounts keep one live deploy' note hints at potentially replacing an existing deploy, aligning with destructiveHint=true.

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 compact and front-loaded with the core purpose. Every sentence earns its place: purpose, trigger phrases, async behavior, status-checking route, and account limit.

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 deployment tool with an output schema and sibling status tool, the description covers the essential workflow: it publishes asynchronously, returns a building status immediately, and directs the agent to get_deployment_status for the outcome. The free-tier one-live-deploy limitation is a valuable contextual detail.

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 covers both parameters with descriptions, so the baseline is 3. The tool description does not add any parameter-specific guidance about subdomain formats or project_name resolution, but none is strictly needed given the 100% schema coverage.

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 and resource: 'Publish a project to a public production URL.' It also clarifies when the tool is meant to be used ('deploy, publish, or go live'), and the immediate-return behavior differentiates it from get_deployment_status.

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?

Explicitly says to use this tool when the user asks to deploy, publish, or go live. It also points to get_deployment_status for checking the result. It does not explicitly contrast with redeploy, but the usage context is clear enough for most cases.

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