regex_regex_validate

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

With no annotations provided, the description carries full burden. It discloses the return type ({valid: true/false}) but does not explain behavior on invalid patterns (e.g., does it throw an error or return false?), nor does it mention supported regex syntax or flags.

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 (16 words) and front-loaded with the '[regex]' tag for quick identification. Every word is necessary, and there is no 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?

For a simple validation tool with one parameter and an explicit return format, the description is almost complete. It covers purpose, input, and output. However, given the lack of output schema and the presence of many regex siblings, a bit more context on usage disambiguation would improve 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 input schema has 0% description coverage for the only parameter 'pattern'. The description adds context that it is a regular expression pattern, which is minimal but helpful. It does not elaborate on expected format, allowed patterns, or constraints beyond the schema.

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 it validates a regular expression pattern and returns a boolean result. It uses a specific verb ('Check') and resource ('regular expression'), and the return format is specified. While it doesn't explicitly distinguish from siblings like regex_regex_match or regex_regex_search, its purpose is sufficiently distinct.

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 guidance is provided on when to use this tool versus the many regex-related siblings (e.g., regex_regex_match, regex_regex_search, regex_regex_escape). There is no mention of prerequisites, alternatives, or context for appropriate use.

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