Deploy the project

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

Annotations only give openWorldHint=false and destructiveHint=true; the description adds substantial context beyond that — upload exclusions (.env, node_modules, build output, private keys, virtualenvs), the single-file/assets-404 failure mode, async behavior via taskId, and the note that the result names skipped .env files. It never explains why it is destructive (that the existing live deployment is replaced), which is the one behavioral gap.

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?

Front-loaded with the action and dense with useful constraints; nearly every sentence carries information. The closing instruction ("tell the user where it is live and on which account") is agent-behavior guidance rather than tool semantics, a minor off-domain addition in an otherwise tight paragraph.

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 no output schema, the description correctly covers the async taskId return and the polling sibling, plus upload exclusions and linking prerequisites. The missing piece is what happens to the previously live deployment on success, which matters given destructiveHint=true.

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 baseline is 3, but the description adds cross-tool meaning for `env` (variables come from set_env/set_env_from_file or here, and platform-managed ones are set automatically) that the schema does not convey. `force` and `directory` are left entirely to the schema.

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?

Opens with a specific verb and resource ("Package a project directory and deploy it") and immediately clarifies scope: the whole directory is uploaded, not an entry point. It names the sibling to poll (deployment_status) and the sibling needed for prerequisites (create_application), so an agent can distinguish it from redeploy and the env-setting tools.

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?

Provides real preconditions (folder must be linked via create_application unless a project key exists) and routes env configuration to set_env/set_env_from_file or the env argument. What it lacks is an explicit deploy-vs-redeploy distinction, which is the most likely sibling confusion given redeploy exists.

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