sympy_xreplace

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

The description adds behavioral context by noting 'without simplification,' which is not present in the schema. However, with no annotations, it fails to disclose other important behaviors such as whether modifications are in place or what happens with failed replacements.

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 extremely concise at four words. While it avoids verbosity, it may be too terse to be fully informative. It earns its place by stating the core idea but lacks structured 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?

Given the presence of an output schema and many sibling tools, the description is insufficient. It lacks explanation of parameters, return value, and usage context, making it hard for an agent to use correctly.

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 must compensate but only provides 'Exact replacement without simplification.' It does not explain what 'expr' and 'mapping' represent, leaving the agent to infer their meaning.

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 'Exact replacement without simplification,' which indicates a specific verb and resource. However, it does not differentiate from similar sibling tools like sympy_replace or sympy_subs, leaving ambiguity about when to use this tool.

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 usage guidelines are provided. The description does not mention when to use this tool versus alternatives like sympy_replace or sympy_subs, nor does it give context for appropriate scenarios.

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