upload_image

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

Discloses that it does not handle multipart uploads, but fails to explain what it does, side effects, or any behavioral traits. Lacks transparency beyond a single limitation.

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?

Two sentences are concise, but the critical contradiction reduces clarity. Front-loads purpose but immediate contradiction harms structure.

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 no output schema and no parameter explanations, the description is insufficient for an agent to understand how to use the tool correctly. Missing key context.

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?

No description for parameters (env_id, agent_token) despite 0% schema description coverage. The description adds no meaning to the input schema.

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 'Upload an image to the environment' but undermines itself by saying it does not handle multipart file uploads, creating confusion about what it actually does. The purpose is ambiguous.

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?

Advises against using it for multipart uploads, directing to external tools, but does not specify appropriate use cases or alternatives within the sibling tools.

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