Text-Toolkit

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'Test' implies a read-only validation operation, the description doesn't specify what the test returns (e.g., boolean match result, match positions, groups), whether it's case-sensitive, how flags affect matching, or any performance considerations. This leaves significant behavioral aspects undocumented.

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 just 6 words, front-loading the core purpose with zero wasted words. Every word earns its place in communicating the basic function, though this brevity comes at the cost of completeness.

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?

For a tool with 3 parameters (0% documented in schema), no annotations, no output schema, and multiple similar sibling tools, the description is inadequate. It doesn't explain what the tool returns, how to interpret results, when to use it versus other regex tools, or provide any parameter guidance. The description leaves too many contextual gaps for effective tool selection and invocation.

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 for all 3 parameters, the description provides no additional semantic information about what 'text', 'pattern', or 'flags' represent. It doesn't explain that 'flags' is optional, what valid flag values are, or provide examples of pattern syntax. The description fails to compensate for the complete lack of schema documentation.

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 action ('Test') and the resources involved ('a regex pattern against text'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'regex_extract', 'regex_replace', or 'regex_split', which all involve regex operations but serve different purposes.

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. With multiple sibling regex tools available (regex_extract, regex_replace, regex_split), there's no indication that this tool is specifically for testing/validating patterns rather than extracting, replacing, or splitting text based on patterns.

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