Create the database this server is connected to

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

Annotations already declare idempotentHint=true, but the description adds valuable behavioral nuance: existing databases are reported as created:false, and behavior differs by storage backend. This goes beyond the structured annotations. No contradiction with annotations is present.

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?

Three concise sentences with no filler. The first sentence states the core purpose, the second clarifies environment-specific behavior, and the third covers idempotency and when to call. Every sentence adds distinct value.

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 parameterless, low-complexity tool, the description is remarkably complete. It covers the operation, environment differences, idempotency behavior, and the explicit error context that should trigger the call. No output schema exists, but the description gives the key response field (created:false) for the relevant edge case.

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 tool has zero parameters, so the baseline is 4. The description correctly explains that the database is derived from the connection rather than provided as an argument, which eliminates any expectation of a parameter. No parameter documentation is needed.

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 action with a specific verb and resource: 'Provision the database named in the connection.' It also clarifies the meaning in different environments (Cloud vs. local/bucket), which removes ambiguity. There is no sibling tool that creates a database, so this stands alone distinctly.

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 gives an explicit trigger condition: 'Call it when a hosted connection answers 404.' It also explains when the operation is a no-op on local paths or buckets. It does not name alternative tools for the same job, but no direct sibling alternative exists.

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