posts

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

The description mentions pagination via maxId and retrieving 12 posts, which is helpful behavioral context. However, it contradicts the schema, which has no parameters, undermining trust in the description.

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 concise at two sentences, but it contains inaccurate and misleading information about parameters. Brevity without correctness is detrimental.

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?

The description omits crucial details about how to identify the user and does not match the schema. Given no output schema or annotations, the description fails to provide a complete picture for an AI agent.

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?

The input schema has no properties, yet the description references 'user ID or username' and 'maxId' parameters. This is a direct contradiction, leaving the AI unable to use the tool correctly.

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 states the tool gets Instagram posts by user ID or username, which gives a clear purpose. However, it mentions parameters that are not present in the input schema, causing confusion about how to specify the user.

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 its siblings (e.g., profile, stories). The description lacks context for distinguishing it among 11 sibling tools.

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