meta_ads_campaigns_update

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

States it is mutating, not automatically reversible, and recommends a rollback safety measure. With no annotations, the description carries the burden; it covers key behavioral traits (partial update, returns updated campaign) but lacks details like permission requirements or error behavior.

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?

Four sentences front-loaded with purpose. Every sentence adds value: purpose, partial update, return, mutability/rollback, and sibling tool guidance. No filler.

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?

Covers purpose, mutability, rollback, and comparisons. Lacks description of return value structure (though schema and output schema absent), but states 'Returns the updated campaign'. With 5 params and no annotations, it provides sufficient context for safe invocation.

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 100%, so baseline is 3. The description adds no extra parameter-specific meaning beyond what the schema already provides (e.g., it mentions 'Partial update' generally but not per-parameter).

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?

Describes clearly that it updates an existing campaign with partial update semantics. Contrasts with sibling pause/enable tools. Sentence 'Updates fields on an existing campaign' provides specific verb and resource, and 'Partial update' adds precision.

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 advises to prefer meta_ads_campaigns_pause / enable for status-only transitions, and suggests recording before-state for rollback. This tells the agent when not to use this tool and what alternatives exist.

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