regex-quality

by XlogicX

Overview Schema Related Servers Score Discussions

Python

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Server Quality Checklist

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Latest release: v0.1.0
Disambiguation4/5
Most tools serve distinct purposes: generation, benchmarking, memory, testing, analysis, rewriting, and fixing. However, analyze, analyze_matrix, and redos_bench all involve growth classification and could be confused by an agent; detailed descriptions mitigate but don't eliminate the overlap.
Naming Consistency3/5
Naming mixes verb-led patterns (gen_benign, suggest_rewrites, analyze_matrix) with noun-phrases (redos_bench, re2_memory, test_cases) and a bare verb (analyze). All names are snake_case and descriptive, but the pattern is not uniform.
Tool Count5/5
9 tools cover the full workflow of regex safety: generation, benchmarking, memory analysis, correctness testing, composite analysis, rewrite suggestion, and automated fixing. Each tool earns its place with a distinct function.
Completeness5/5
The server provides end-to-end coverage from generating attack strings to verifying safe rewrites, including multi-engine classification. No obvious dead ends; fix_until_safe offers a guaranteed outcome or honest failure.
Average 3.8/5 across 9 of 9 tools scored. Lowest: 2.7/5.
See the Tool Scores section below for per-tool breakdowns.
- No community issues in the last 6 months
- 3 commits in the last 12 weeks
- No stable releases found
- No critical vulnerability alerts
- No high-severity vulnerability alerts
- No code scanning findings
- CI status not available
This repository is licensed under MIT License.
This repository includes a README.md file.
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}
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How is the quality score calculated?

The overall quality score combines two components: Tool Definition Quality (70%) and Server Coherence (30%).

Tool Definition Quality measures how well each tool describes itself to AI agents. Every tool is scored 1–5 across six dimensions: Purpose Clarity (25%), Usage Guidelines (20%), Behavioral Transparency (20%), Parameter Semantics (15%), Conciseness & Structure (10%), and Contextual Completeness (10%). The server-level definition quality score is calculated as 60% mean TDQS + 40% minimum TDQS, so a single poorly described tool pulls the score down.

Server Coherence evaluates how well the tools work together as a set, scoring four dimensions equally: Disambiguation (can agents tell tools apart?), Naming Consistency, Tool Count Appropriateness, and Completeness (are there gaps in the tool surface?).

Tiers are derived from the overall score: A (≥3.5), B (≥3.0), C (≥2.0), D (≥1.0), F (<1.0). B and above is considered passing.

Tool Scores

Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden for behavioral disclosure, but it only mentions that the generated string is minimal and matches quickly. It does not cover timeout behavior, engine defaults, failure modes, or how 'minimal' is defined, leaving significant transparency gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, front-loaded sentence with no fluff, effectively conveying the core action. However, it is under-specified for a tool with three parameters, though that lack is captured in other dimensions.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
While an output schema exists, the description omits usage context, parameter details, and behavioral notes. The tool is relatively simple, but the combination of no annotations, 0% schema coverage, and minimal description leaves the agent without enough information to select and invoke it confidently.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, and the description only references 'pattern' implicitly ('*pattern* matches quickly'). The 'engine' and 'timeout_ms' parameters are not mentioned at all, providing insufficient semantic context for parameter usage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose4/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool generates a minimal string that matches a pattern quickly, with 'the baseline' hinting at its role as the benign counterpart to gen_evil. The verb 'generate' and resource 'string' are specific, though sibling differentiation relies on implication rather than explicit contrast.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
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 alternatives like gen_evil or redos_bench. The term 'baseline' implies a comparison but does not explicitly state usage scenarios, prerequisites, or exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior2/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must fully disclose behavior, but it only vaguely says 'sweep' without explaining that this likely involves many compilation attempts, potential performance impacts, or side effects. It also doesn't state what happens on failure or how results are returned.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, concise sentence that immediately states the action and purpose. It contains no filler, is well-front-loaded with the verb 'Sweep', and efficiently delivers the key information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
While an output schema exists (blunting the need to describe return values), the tool lacks guidance on when to use it, what the pattern parameter means, and what the 'sweep' entails operationally. For a tool with one parameter and no annotations, this is insufficiently context-rich.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema has only one parameter, 'pattern', with 0% description coverage. The description never mentions this parameter or explains that 'pattern' is the regex to test. This is a significant gap since the parameter's role is left to inference.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's specific purpose: sweeping RE2 max_mem to find the compile-memory cliff. It names the resource (RE2 max_mem), the action (sweep), and the exact outcome (largest failing cap, smallest succeeding cap), distinguishing it from siblings like analyze or suggest_rewrites.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no explicit when-to-use guidance, alternatives, or prerequisites. It implies use when you need to understand memory limits for a specific regex pattern, but it never states this directly or contrasts with sibling tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
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 disclosure. It transparently states the return value (the evil string and whether it fails to match) and importantly clarifies that a timeout counts as failing, which is a key behavior for understanding the vulnerability.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is exactly two sentences with no filler. It front-loads the core action, then adds the key return-value detail and timeout semantics, making every word earn its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool has 4 parameters, no annotations, and an output schema whose content is unknown. While the description explains the main generation behavior and return status, it omits details about the other three parameters and does not address error cases or engine-specific behavior, leaving the description incomplete for reliable invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters1/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 4 parameters with 0% schema description coverage. The description only mentions the pattern placeholder and does not explain the meaning or usage of engine, qlimit, or timeout_ms. With no other source of parameter information, this is a significant gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description begins with a specific verb ('Generate') and identifies the resource ('adversarial string') and the mechanism ('pumps *pattern* and then fails to match, forcing maximal backtracking'). This clearly distinguishes the tool from its sibling gen_benign, which presumably generates benign strings.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines2/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description does not state when to use this tool versus alternatives like gen_benign or redos_bench. It implies use for testing ReDoS vulnerabilities by generating backtracking-inducing strings, but provides no explicit context, prerequisites, or exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for behavioral disclosure. It reveals that the tool times both evil and benign strings, sweeps pump sizes, and produces a verdict naming the engine. However, it does not disclose potential computational cost, timeout behavior, or side effects, leaving significant gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is compact and front-loaded, with two sentences covering the core action, goal, and outcome. It avoids redundancy but uses somewhat cryptic phrasing ('evil vs benign string') that could be clearer without adding length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness3/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Output schema exists, so return values are covered, but the description lacks context about prerequisites (e.g., valid regex pattern), how the tool interacts with sibling tools (gen_benign/gen_evil), and what the verdict actually implies. No annotations exist, so the description is the only context and it is incomplete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 0%, so the description must explain parameters. It never mentions 'pattern', 'engine', 'qlimit', or 'timeout_ms' by name, and the reference to 'pump sizes' does not map clearly to any parameter. This leaves the agent guessing about how to set parameters correctly.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses specific verbs ('time', 'sweep', 'classify') and clearly identifies the resource (evil vs benign strings) and the goal (classify growth as linear/polynomial/exponential). It distinguishes itself from sibling tools (gen_benign, gen_evil, analyze) by being the benchmarking/classification tool.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for classifying ReDoS growth patterns but does not explicitly state when to use this tool versus alternatives like analyze or re2_memory. No excluded scenarios or cross-references to sibling tools are provided, leaving usage context vague.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full transparency burden. It discloses meaningful behavioral details: the three criteria for acceptance, rejection output (names dangerous construct and safe rewrite families), and a limitation (does not auto-rewrite). It omits potential side effects like whether user-supplied test cases are executed, but the core behavior is well covered.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is very concise and well-structured: three sentences, front-loaded with the tool's purpose, and each sentence adds critical information (accept criteria, rejection behavior, non-rewrite boundary). No filler or redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness2/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite having an output schema, this is a 7-parameter tool with no schema descriptions and no annotations. The description provides a strong high-level overview, but it is insufficiently complete for an agent to correctly configure parameters like qlimit, timeout_ms, and positives/negatives. The complexity demands more parameter-level detail and usage guidance than is provided.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema description coverage is 0%, so the description must compensate. It references 'pattern' and hints at test cases and 'RE2 memory bound,' which map to positives/negatives and mem_bound_bytes, but it fails to explain engine, qlimit, timeout_ms, or the structure of positives/negatives. This leaves several parameters under-specified for correct invocation.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description opens with 'Composite verdict' and clearly specifies the exact accept criteria (passes all test cases, no super-linear NFA growth, RE2 memory bound). It also distinguishes itself from siblings by framing itself as an overarching analyzer and explicitly noting it does not auto-rewrite, which sets it apart from mutation-oriented tools.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context: this tool returns a composite accept/reject verdict and is not for rewriting. It implies when to use it (when a holistic safety decision is needed) and when not (when auto-rewrite is desired), though it does not explicitly name sibling alternatives or provide explicit exclusions beyond 'Does not auto-rewrite.'
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior4/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description carries the transparency burden. It discloses the use of a 'killable subprocess' (important for safety against ReDoS hangs) and states the return contents (pass plus false positives/negatives). This goes beyond the schema and provides useful behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two short sentences, front-loaded with the action verb 'Check', and contains no filler or irrelevant detail. Every word contributes to understanding the tool's function and behavior.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The description covers the core purpose, key parameters, return value, and the important safety behavior (subprocess/killable). Given that an output schema exists and optional parameters have defaults, the description is adequate, though it could mention the `engine` and `timeout_ms` parameters for completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description explains the semantic roles of the three required parameters: `pattern`, `positives`, and `negatives`. However, it does not explain the optional `engine` or `timeout_ms` parameters. With 0% schema coverage, the description only partially compensates for the missing parameter documentation.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's function with a specific verb ('Check'), the resource ('*pattern*'), and the expected outcome ('matches all positives and rejects all negatives'). This distinguishes it from sibling tools like `gen_benign` or `analyze`, which have different purposes.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines3/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies when to use the tool (to validate a regex against positive/negative examples) but provides no explicit guidance on when to prefer it over alternatives or what prerequisites exist. It does not mention exclusions or alternatives, so it earns a mid-range score.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior5/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It reveals that missing engines appear with available=false and a skipped_reason (never silently omitted), that overall_accepted is true only under strict conditions (otherwise honestly 'unverified'), and that DFA/memory and correctness runs are deduplicated. This is rich, non-obvious behavioral detail.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The first sentence is a clear, front-loaded summary. The following paragraphs are logically organized into usage context, per-engine behavior, and overall acceptance logic. Every sentence adds value and there is no redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity and the presence of an output schema, the description explains engine defaults, availability handling, and overall_accepted logic well. However, key input parameters (positives, negatives, timeout_ms) are left undefined, leaving a modest completeness gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters2/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema has 0% description coverage, so the description must compensate. It clarifies the engines parameter's null/default behavior (whole registry) and explains result semantics. However, it does not define the positives, negatives, or timeout_ms parameters, leaving critical input semantics ambiguous. Compensation is only partial.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description opens with a specific verb ('Classify NFA growth') and clearly scopes the tool to one pattern across multiple regex engines, returning a per-engine matrix. This distinguishes it from sibling tools like gen_benign/gen_evil and analyze, and the use case ('decide whether a pattern is safe on the engine you actually deploy on') reinforces its purpose.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines4/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly states when to use the tool: 'Use this to decide whether a pattern is safe on the engine you actually deploy on'. It contrasts backtracking vs automaton engines, giving clear context. It does not explicitly name alternative sibling tools, so it stops short of a 5, but the usage context is unambiguous.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior5/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. It discloses important behavioral traits: success requires verification on every requested engine, returns are never fabricated, failures include a failure_reason and closest candidate, and behavior is deterministic for a seed. This goes well beyond a basic summary.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness5/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise and well-structured: a clear opening sentence, a usage directive, and a compact specification of success/failure conditions. Every sentence adds value and no filler is present.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness4/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a complex tool with 9 parameters and an output schema, the description covers the core algorithmic behavior, safety guarantees, failure mode, and determinism. It does not explain every parameter or timeout/loop-bound details, but the output schema and parameter names carry some of that weight, making it mostly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must compensate. It adds meaning for engines (default ['python']) and seed (determinism), but leaves several parameters — fuzz_n, max_iterations, positives, negatives, equivalence_mode — semantically unexplained. Additionally, the description's engines default contradicts the schema default of null, creating a small inconsistency.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb and resource ('Drive suggest_rewrites in a loop') and clearly states the outcome: a guaranteed-safe equivalent or an honest failure. It distinguishes itself from the sibling tool suggest_rewrites by framing this tool as the iterative, server-driven wrapper that returns a final trusted result.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines5/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
It explicitly says 'Use this when you want the server to do the iteration for you and hand back a single fixed pattern you can trust,' giving clear when-to-use guidance. It also defines success criteria and failure behavior, making the choice between this and lower-level siblings like suggest_rewrites straightforward.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Behavior5/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description fully bears the transparency burden. It details the three independent verification checks (correctness on positives/negatives, non-super-linear growth, language equivalence), explains that `safe`/`best` are only assigned when all checks pass, states `best` is null if nothing verifies, mentions determinism for a given seed, and calls out engine compatibility limitations. This is comprehensive behavioral disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Conciseness4/5
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is dense but well-organized: core purpose, usage context, verification process, and caveats are presented in a logical progression. Every sentence adds information, though it is somewhat lengthy. It earns a high score for structure without being excessively verbose.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Completeness5/5
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (8 parameters, no annotations) and that an output schema exists (which covers return structure), the description is complete. It covers when to use, how verification works, failure behavior (`best` null), determinism, and engine limitations. This is sufficient for an agent to select and invoke the tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Parameters3/5
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%. The description adds meaning for key parameters (`seed`, `engine`, `positives`/`negatives`) by explaining their roles in determinism, engine-specific parsing, and correctness checks. However, `fuzz_n`, `timeout_ms`, and `equivalence_mode` are not mentioned, leaving gaps in the parameter semantics. It partially compensates but not fully for all 8 parameters.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Purpose5/5
Does the description clearly state what the tool does and how it differs from similar tools?
The description opens with 'Mechanically generate safe-rewrite CANDIDATES for a ReDoS-prone pattern and return only the ones that are VERIFIED,' which uses a specific verb and resource. It clearly distinguishes from siblings by referencing `analyze`/`redos_bench` flags and offering concrete replacements rather than technique names.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Usage Guidelines5/5
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly states when to use: 'Use this when `analyze`/`redos_bench` flags a pattern as super-linear and you want a concrete, drop-in replacement rather than just the name of a technique.' It also provides alternative-aware guidance by contrasting with 'name of a technique' and highlights engine caveats for atomic-group candidates.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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