update_sp_target_state

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

With no annotations provided, the description must carry the full burden. It discloses that the tool supports preview and set operations, and that it is a 'guarded write'. It also clarifies that this local server is an introspection stub, which is important behavioral context. However, it does not describe any side effects, return values, or error conditions.

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 sentence that efficiently conveys key information: purpose, guarded nature, and the fact that it's a stub. No redundant phrases.

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 5 parameters, no required fields, no output schema, and many sibling tools, the description is incomplete. It does not explain the expected format of the 'changes' parameter, how preview differs from set, or what the return value looks like. More detail is needed for an agent to use it effectively.

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?

All 5 parameters have descriptions in the input schema (100% coverage), so the baseline is 3. The description does not add significant meaning beyond the schema, except for implying the 'preview' and 'dry_run' are aliases for preview behavior, but this is already implied by their names.

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 specifies the verb ('Preview or set') and resource ('Sponsored Products target state'), clearly indicating the tool's function. The intro 'Ads / guarded write' adds context, and the name itself differentiates from sibling tools like 'update_sp_negative_target_state' or 'update_target_bids'. However, explicit differentiation from closely related siblings is not provided.

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?

The description does not provide any guidance on when to use this tool versus alternatives, nor does it specify prerequisites or exclusions. The note about being a 'local stdio server' introspection stub implies it is not functional for actual writes, but this is more about tool availability than usage context.

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