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

With annotations carrying only generic false hints, the description adds meaningful behavioral detail: the operational effect on Runs and the ownership/permission constraints. It does not contradict annotations and gives an agent a realistic expectation of side effects.

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 front-loaded sentences: the first states the action and effect, the second adds permission constraints. No redundant or filler content.

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?

The description covers purpose, effect, and permissions, which is adequate for a simple mutation tool. However, with no output schema, no parameter descriptions, and no annotation details, an agent is left to infer the meaning of the three UUID parameters, so the definition is not fully 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%, so the description must compensate for the undocumented agentId, buildId, and credentialId. It mentions 'secret' and 'revision' conceptually but never maps those concepts to the actual parameters or explains what each ID refers to.

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 uses a specific verb ('Attach'), names the resource ('env-var secret to a revision'), and states the expected effect ('keys are injected into Runs spawned from that revision'). This clearly differentiates it from siblings like attachRevisionIntegrations and detachRevisionSecret.

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?

It states clear context for when this operation applies—attaching a secret to a revision for injection into Runs. It adds permission conditions for personal vs team-shared secrets, though it does not explicitly name alternatives or when-not-to-use cases.

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