explain_regex

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

Extremely detailed behavioral disclosure covering read-only nature, idempotency, rate limits, authentication, error handling, and data privacy. Since no annotations are provided, this description fully compensates and provides comprehensive transparency.

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 well-structured with clear sections and front-loads the primary purpose. However, there is redundancy between the general behavior section and the detailed behavioral transparency section, making it slightly longer than necessary.

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?

Covers purpose, behavior, usage, limitations, and privacy well. The presence of an output schema means return value details are not needed. However, parameter descriptions are insufficient, and the inconsistency about api_key authentication reduces completeness.

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 'Args' section provides minimal descriptions ('The pattern to analyze or process') that do little beyond restating parameter names. There is inconsistency between the api_key parameter description and the later mention of environment variable MEOK_API_KEY. With 0% schema description coverage, the description fails to sufficiently clarify parameter 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 clearly states the tool's purpose in the first sentence: 'Explain a regex pattern in plain English.' It distinguishes from siblings (build_regex, extract_matches, test_regex) by focusing on explanation rather than building, extracting, or testing.

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?

Provides dedicated 'When to use' and 'When NOT to use' sections, offering clear guidance on appropriate contexts. While it does not explicitly compare to sibling tools, the usage guidance is sufficient for a user to understand when to choose this tool.

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