Pararam Nexus MCP

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

No annotations are provided, so the description carries the full burden. It mentions the tool uploads a file and returns details, but doesn't disclose critical behavioral traits such as required permissions, file size limits, supported file types, or potential side effects (e.g., notifications to chat members). This leaves significant gaps for an agent to understand operational constraints.

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 appropriately sized and front-loaded: the first sentence states the purpose clearly. The structured 'Args' and 'Returns' sections are efficient, though slightly verbose. Every sentence earns its place by providing necessary information without redundancy.

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 the complexity (5 parameters, no annotations, but with an output schema), the description is fairly complete. It covers all parameters and return values, and the output schema handles return details. However, it lacks context on behavioral aspects like error conditions or usage scenarios, which would enhance completeness for a mutation tool.

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?

With 0% schema description coverage, the description compensates well by explaining all 5 parameters in the 'Args' section. It clarifies mutual exclusivity between file_path and file_content, specifies when filename is required, and notes optionality for reply_to_message_id. This adds substantial meaning beyond the bare schema, though it could benefit from examples or format details.

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 starts with a clear, specific verb+resource statement: 'Upload a file to a chat.' It distinguishes this tool from siblings like 'send_message' (which presumably sends text) and 'download_post_attachment' (which downloads rather than uploads). The purpose is unambiguous and immediately understandable.

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 usage through parameter documentation (e.g., 'mutually exclusive' for file_path and file_content), but lacks explicit guidance on when to use this tool versus alternatives. For instance, it doesn't mention whether this is for sharing files in ongoing conversations or if there are prerequisites like chat access. The context is clear but not comprehensive.

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