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

No annotations are provided, so the description carries the full burden and delivers nothing: no statement of whether it mutates or just parses text, no output shape, no explanation of how the three input fields differ. Zero behavioral disclosure for an unannotated tool.

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?

Extremely short, but brevity here reflects under-specification rather than tightness. The single repeated phrase is not front-loaded around any actionable information, so nothing earns its place.

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?

With no annotations, no output schema, three ambiguous string parameters, and a tautological description, an agent has insufficient information to select or correctly invoke this tool.

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?

Schema description coverage is nominally 100%, which sets the baseline at 3, but the supplied descriptions ('Md to process', 'Text to process', 'Input to process') are near-synonymous placeholders for three mutually exclusive-looking string params. The tool description does nothing to disambiguate which field to populate, though per the schema-coverage rule this sits at the baseline.

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 is essentially the tool name restated: "Markdown Toc: Markdown Toc". The token 'TOC' weakly implies table-of-contents generation of markdown, but there is no verb and no scope, so an agent cannot confidently distinguish this from siblings like x402-markdown, x402-markdown-links, or x402-markdown-tool.

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 when-to-use guidance, no alternatives, no prerequisites, no input format expectations. The agent must guess entirely from the name which markdown headings/TOC problem this solves.

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