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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'Set', implying a mutation, but does not state whether changes are reversible, what happens to existing permissions, whether it requires special authorization, or if it is synchronous. The word 'owned' hints at ownership but without elaboration. This is a significant gap for a state-changing operation.

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?

The description is a single, concise sentence with no unnecessary words. It front-loads the action and resource, and efficiently conveys the core purpose. There is zero waste, which is ideal for conciseness.

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?

Given the tool has 4 parameters, no output schema, and no annotations, the description is far from complete. It does not mention what the tool returns or how success is indicated, any error conditions, prerequisites like ownership verification, or whether this is part of a multi-step workflow (e.g., prepare/confirm). For a mutation tool, this level of detail is inadequate.

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 parameter meanings. It mentions 'pull/create/decision policy' which loosely maps to the three boolean parameters (allow_pull, allow_create, allow_decision), but does not explain what each policy means or how they interact. The connection_ref parameter is not mentioned at all. The description adds minimal value beyond the parameter names, which are self-explanatory only to a degree.

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 ('Set') and the resource ('pull/create/decision policy for one owned Google connection'). It conveys the tool's purpose without ambiguity. However, it does not explicitly differentiate from the sibling tool google_ads_customer_route_permissions_set, which is similar in nature, so it lacks strong sibling differentiation.

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 guidance on when to use this tool versus alternatives, such as when to use this for connection permissions versus customer route permissions. No context about prerequisites, ownership requirements, or whether this should be used before or after other steps. The description leaves the usage scenario entirely to inference.

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