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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=false, covering the safety profile, yet the description still adds a genuinely non-obvious behavioral fact: the change is deferred to the next deploy rather than applied immediately. It omits other relevant behavior such as whether existing env vars are removed, whether a redeploy is required, and whether prior deployments are affected, so a 3 is appropriate.

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?

One short, front-loaded sentence with zero filler that leads with the concrete action. It is efficient, though arguably terse given the operation's implications.

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 state-changing tool with no output schema, 0% parameter coverage, and no annotation detail beyond the safety hints, the agent is left without prerequisites, side effects on existing deployments, or confirmation of whether data is preserved. The deferred-effect note helps but does not make the definition complete.

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 description coverage is 0% and neither required parameter (managedDatabaseId, deploymentId) is mentioned or explained in the description. The parameter names are largely self-descriptive, but the description does nothing to compensate for the total lack of schema documentation.

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 states a concrete effect (stops injecting database connection env vars) which unambiguously identifies this as the inverse of nexusai_managed_db_attach. It is clear what the tool does, though it describes the mechanism rather than naming the 'detach' operation directly and does not restate which database/deployment pairing applies.

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?

There is no when-to-use guidance, no prerequisite (e.g. must currently be attached), and no explicit reference to the attach sibling as the reversing operation. The agent must infer usage entirely from the tool name and mechanism.

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