Decode barcode image

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

Annotations already declare the tool as read-only, idempotent, and non-destructive. The description adds the key behavioral detail that it does not log intake, which is beyond what annotations provide. However, it does not describe error handling, success output, or other side effects.

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 sentence that front-loads the main purpose. It is concise, but slightly under-specified given the number of parameters and lack of detail.

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?

Despite helpful annotations, the description lacks completeness: it does not explain how to provide input (e.g., mutual exclusivity of image sources), expected output format, error cases, or the meaning of 'without logging intake' in practical terms. This is insufficient for a tool with 5 optional parameters and no output schema.

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 must compensate. It only explains three of the five parameters (image_path, image_base64, image_data_uri) but does not explain image_mime_type or response_format, nor the meaning of the enums. This is insufficient for an agent to understand parameter usage.

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 the verb 'decode' and the resource 'barcode image', and specifies three input sources (image path, base64, data URI). It also notes that it does not log intake, distinguishing it from similar sibling tools like 'nourish_lookup_barcode' and 'nourish_lookup_barcode_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?

It mentions 'without logging intake', which implies a condition for use, but does not explicitly state when to use this tool vs. the lookup alternatives, nor does it provide prerequisites or context for when this tool is appropriate.

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