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

With no annotations, the description carries full burden for behavioral disclosure. It only says 'Set' which implies mutation, but does not mention whether this overrides existing policies, requires specific credentials, is reversible, or what the response contains. For a mutation tool, this is a significant gap.

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, front-loaded sentence with no wasted words. It states the core action and scope immediately, making it easy to scan.

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 tool with 5 parameters, no annotations, and no output schema, this description is too sparse. It lacks explanation of what 'pull/create/decision policy' means in practice, what the response looks like, and how the route is identified. An agent cannot confidently invoke this tool correctly without additional schema inspection and inference.

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% – the description does not explain any of the five parameters. While it hints at 'pull/create/decision' mapping to allow_pull, allow_create, allow_decision, it does not describe connection_ref or customer_id, nor their formats or required context. The description fails to compensate for the low coverage.

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 (policy for one owned connection/customer route). It specifies the policy types (pull/create/decision) which maps to the boolean parameters. It does not explicitly differentiate from the sibling google_ads_connection_permissions_set, which may cover similar ground, but the 'route' specificity adds some distinction.

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?

No guidance is provided on when to use this tool versus alternatives. There is no mention of prerequisites, ownership requirements, or that this is per-route versus a broader connection-level permission setter. The agent gets no help selecting this tool over google_ads_connection_permissions_set or other permission-related tools.

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