get_pixel

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

With no annotations, the description carries the burden. The verb 'Fetch' clearly implies a read-only operation, which is a key behavioral trait. However, it does not disclose what happens on error (e.g., not found), permission requirements, or return format, though for a simple getter this is minimally adequate.

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, front-loaded sentence with no filler words. Every word earns its place, making it highly concise and well-structured.

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?

For a simple single-parameter getter, the description is mainly complete, but it lacks disambiguation from the related get_custom_pixel tool and does not describe the return value (no output schema exists). It is adequate but not thorough.

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 'id' parameter has a clear description with an example. The description's phrase 'by ID' simply mirrors the schema, adding no extra semantic detail. 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 'Fetch a specific pixel by ID' clearly states a specific action (fetch) and resource (pixel), with scope ('specific... by ID'). It distinguishes from sibling get_pixels (plural listing) but does not explicitly disambiguate from get_custom_pixel, so full distinction is left to the name.

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?

No guidance is provided on when to use this tool versus alternatives. There is no mention of when to prefer get_pixel over get_pixels or get_custom_pixel, nor any contextual hints like 'use this when you have a pixel ID'.

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