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

The annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds that it applies approved values to one ad's reviewed text fields, but does not add operational context such as token requirements, failure behavior, or what happens on repeated calls beyond the idempotency annotation.

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 single sentence is front-loaded with the core action and avoids filler. It is appropriately sized for the information it conveys, even though more information would be needed for completeness.

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?

A mutation tool with four undocumented parameters and a required confirm token needs more than a one-line description, even though annotations cover safety and an output schema exists. The description omits how the token is used, what old_value/new_value mean, and the prerequisite confirm flow, leaving important invocation context unstated.

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%, with four parameters including the required confirm_token. The description vaguely implies old/new values and an ad entity, but it never explains confirm_token, entity_name, old_value, or new_value, so it does not compensate for the lack of schema documentation.

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 states a specific action — running a previously confirmed change — and scopes it to reviewed text fields on one Meta ad, moving them from current to approved values. It is clear what the tool does, but it does not explicitly name the sibling prepare/deny tools it pairs with.

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 phrase 'the change the user just confirmed' implies the tool should be called after a prior confirmation step, which is useful context. However, it does not explicitly state prerequisites such as calling ads_update_copy_prepare first, nor when to use ads_update_copy_deny instead.

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