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

Annotations already declare idempotentHint=true and destructiveHint=false, so the bar is lower. The description still adds real value: it says what is actually created (isolated schema with row-level security) and what a repeat call returns (the existing backend) rather than erroring — behavior an agent needs to interpret results. It does not cover auth requirements or latency of provisioning.

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 short sentences, front-loaded with the action and its effect, followed by the repeat-safety caveat. Nothing is redundant or padded.

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 one-parameter provisioning tool with no output schema, the description covers the side effect, safety profile, and repeat behavior adequately. Missing only minor context such as prerequisites or whether provisioning is asynchronous.

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?

There is a single parameter with 100% schema description coverage ('Project UUID'), so the schema fully documents it. The description adds no further semantics about the id (e.g., that the project must exist), which is the baseline for high-coverage schemas.

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 verb and resource (provision the database backend) and adds concrete scope: an isolated schema with row-level security. It does not name the nearest sibling get_project_backend, so the boundary with a pure read of the backend is only implied by the 'safe to repeat' sentence.

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 'safe to repeat' note implies you can call it defensively, but there is no explicit when-to-use guidance, no prerequisite (project must already exist), and no contrast with get_project_backend or create_project. Usage context is implied rather than stated.

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