mcp-sympy

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 correctly indicates this returns a mathematical set constant rather than performing computation. However, it doesn't disclose whether this is a read-only operation, what format the output takes, or any limitations. The description is accurate but lacks behavioral details.

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, efficient sentence that communicates exactly what's needed. There's zero wasted verbiage, and it's front-loaded with the essential information. For a simple constant-retrieval tool, this is perfectly sized.

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 this is a simple, parameterless tool that returns a mathematical constant, the description is reasonably complete. The existence of an output schema means the description doesn't need to explain return values. However, it could better contextualize why/when to use this specific mathematical set versus alternatives.

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 tool has zero parameters, and schema description coverage is 100%. The description appropriately doesn't waste space discussing parameters that don't exist. It focuses solely on what the tool returns, which is correct for a parameterless constant-retrieval function.

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 tool returns 'the set of natural numbers (including 0)', which is a specific mathematical concept. It distinguishes itself from siblings like 'sympy_integers' or 'sympy_reals' by specifying the particular number set. However, it doesn't explicitly mention this is a retrieval/access function rather than a computation.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention when this mathematical constant would be needed in symbolic computation, nor does it differentiate from similar constant tools like 'sympy_integers' or 'sympy_reals' in the sibling list.

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