Set creation defaults

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

Annotations already set destructiveHint=true, so the agent knows it's a mutation. Description adds the 'merge-patch' semantics, which clarifies that only provided fields are updated, not replaced. This is valuable context beyond annotations.

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?

Single sentence, efficient but includes an inaccuracy (mentions 'page' not in schema). Could be more precise without the error.

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?

No output schema. Description does not state what the tool returns (e.g., updated defaults) or how to handle errors. For a destructive mutation, this missing information harms completeness.

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 coverage is 0% - no descriptions in schema. Description lists parameter names but includes 'page', which is not in the input schema (contradiction). No explanation of parameter meanings beyond names and enum literals. Inaccurate listing reduces usefulness.

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?

Description clearly states it merges-patches creation defaults, listing the affected fields and requiring marketing:write permission. It sets itself apart from siblings like read_creation_defaults (read-only) and spawn_creation (create).

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?

Explicitly says requires marketing:write, indicating a precondition. Does not explicitly state when not to use or compare to alternatives, but context implies it is the update counterpart to read_creation_defaults.

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