get_pixel

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

No annotations are present, so the description carries the behavioral burden. It does convey the core read-only nature and output format (RGBA), but it omits boundary behavior, coordinate system, and how frame/layer defaults are applied. These are meaningful for correct invocation.

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, beginning with the action verb. It is minimal but not wasteful; the lack of detail is better attributed to other dimensions.

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 annotations and zero parameter descriptions in the schema, a five-parameter tool needs more than one sentence to be called correctly. The description omits how path is resolved, how frame/layer indexing works, and coordinate bounds, even though an output schema may cover the return format.

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%, so the description needed to compensate, but it only adds the phrase 'from a layer/frame,' linking frame/layer to the operation. It gives no meaning for path, x, or y beyond their names, leaving defaults and coordinate semantics unexplained.

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 uses a specific verb ('Read'), names the exact resource ('one pixel as RGBA'), and locates it ('from a layer/frame'). This clearly differentiates it from sibling tools like set_pixel (write) and get_png_data (whole image).

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 the tool is for reading a single pixel, but it never explicitly states when to choose it over siblings like set_pixel or get_png_data. The 'Read' verb and 'one pixel' scope provide only implied usage guidance.

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