set_content_context

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

Goes meaningfully beyond the annotations by disclosing the consumer ('read by the running controller') and a lifecycle limit ('expires after four hours'), plus an explicit scope exclusion ('does not infer scene events/goals'). With idempotentHint/destructiveHint already given, this is solid added context; only the failure behavior for unverified IDs is missing.

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?

Three short sentences, front-loaded with the action, then parameter guidance, then runtime behavior. No filler and no repetition of the schema.

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?

With no output schema, the description covers the important runtime facts (who reads the data, four-hour expiry) and scope limits. It is nearly complete for a write tool; the remaining gap is that valid keys inside the free-form 'context' object are only illustrated, not specified.

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% and the nested 'context' object is additionalProperties:true with no property docs, so the description must compensate. It does partially, naming likely context keys (genres, format, sport, participants) and characterizing 'app'/'content_id' as verified IDs, but it never enumerates allowed keys definitively or types for the content object.

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?

States a specific verb and resource ('Set structured content slots') plus the scoping constraint 'one verified app/content ID', which is more precise than the bare name. It does not explicitly differentiate from siblings, but no sibling in the list touches content context, so the risk of confusion is low.

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?

'Use genres for movies, format/sport/participants for videos' gives real conditional guidance on how to populate the context object. However, there is no statement of when to call this versus not calling it, or any prerequisite beyond 'verified' IDs; usage is implied rather than spelled out.

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