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Models SaaS and subscription billing analytics based on plan adjustments
Single tool 'plan_pricing' has a clear, concise description (128 chars, within 10-1024 range) and well-structured input schema with all parameters typed and described. However, the tool violates fundamental Agentic Tool Patterns by using a non-verb name ('plan_pricing' should be 'calculate_pricing' or 'simulate_pricing'). The schema is visible and complete, but lacks critical features for production use: no output schema documentation, no error handling guidance, no pagination support (though not needed for this single-value tool), and no tool annotations. The implementation is read-only but lacks explicit documentation of this. No prompts, resources, or advanced features are implemented. This is a minimal, single-purpose tool with adequate but incomplete definitions.
Models SaaS and subscription billing analytics based on plan adjustments
Tool name does not start with action verb. 'plan_pricing' uses a gerund-style name; should be 'calculate_pricing', 'simulate_pricing', or 'get_pricing_projection' to clarify the action.
Output schema is not documented in tool definition. The implementation returns a dict with 4 fields, but the tool definition does not specify this structure. LLMs cannot plan downstream actions without knowing what fields to expect.
No error handling or recovery guidance. The implementation clamps churn_rate_monthly to [0.005, 1.0] but does not document this behavior in the tool description. If an LLM passes invalid input (negative subscribers, churn > 1.0), the response silently clips values without explaining what happened.
Tool does not use action-verb naming convention. Baseline data shows 90% of A+ tools start with action verbs (get, list, create, search, update). 'plan_pricing' is ambiguous, the description says 'Models', but the name suggests planning, not modeling.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 50 | 2026-07-28+ | v2 |
No tool annotations (readOnlyHint, destructiveHint, or idempotentHint). The tool is safe to retry and read-only, but this is not declared. Per current spec (2026-07-28), tools should include annotations for LLM safety reasoning.
Parameter constraints not fully documented. 'churn_rate_monthly' accepts 0.0-1.0, but description does not state range. 'active_subscribers' must be non-negative integer, but description lacks constraint. LLMs may pass invalid values.