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

With annotations indicating readOnlyHint=true, openWorldHint=false, and destructiveHint=false, the safety profile is clear. The description adds valuable behavioral context: it returns a dashboard viewUrl and attaches scene visuals as resource links, and clarifies that these are source clips/images with text overlays and greenscreen applied at render time, directing users to open the viewUrl for the final result.

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 two sentences, front-loading the core purpose and then detailing the return behavior. It is reasonably concise, though slightly dense with technical details about resource links and rendering, but every sentence contributes.

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 there is no output schema, the description provides crucial information about the return value: a viewUrl and resource links for scene visuals, with an explanation of rendering differences. It is nearly complete, though it could mention pagination or error cases, but for a single-item fetch, it covers the essentials.

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%, and the only parameter (snackId) is fully described in the schema as 'Snack post UUID'. The description adds no additional parameter details beyond what the schema provides, so baseline 3 is appropriate.

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 clearly states a specific verb (Fetch) and resource (a single snack post with its manifest) by id. It distinguishes from list_snacks by specifying it fetches one by id, but doesn't explicitly name the sibling alternatives like get_influencer_snack or list_snacks.

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 implies usage by stating 'by id', which suggests it should be used when you have a snackId. However, there are no explicit when-to-use or when-not-to-use statements, nor any mention of alternatives.

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