agentmd

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

With no annotations and no output schema, the description carries the full behavioral burden. It does add useful context: input must be base64-encoded, and output is deliberately formatted for LLM consumption. But it does not disclose what the tool returns (raw markdown string? wrapped object?), conversion fidelity for complex documents (tables, images), or any size limits — meaningful gaps for a tool with zero annotation coverage.

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?

Two sentences with zero waste. The first front-loads the core purpose and scope (formats, output); the second delivers the single critical invocation requirement. No filler, no repetition of schema content.

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 2-param tool with 100% schema coverage and no nested objects, the description covers purpose, supported formats, and input encoding. The main gap is that no output schema exists and the description never states the return shape, though 'clean, LLM-ready markdown' strongly implies the converted text is returned directly. The sibling distinction, while implicit, is sufficient for routing.

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 100%, so the schema already documents base64 ('Base64-encoded file contents') and filename ('helps format detection'). The description restates the base64 requirement but adds nothing beyond the schema — it doesn't explain why base64 is needed or elaborate on how filename influences format detection. Baseline 3 is appropriate since the schema carries the parameter documentation burden.

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?

States a specific verb (convert), resource (a document), supported source formats (PDF, DOCX, HTML, plain text), and output (clean, LLM-ready markdown). The phrase 'you already have' subtly distinguishes it from the sibling convert_url_to_markdown, so an agent can tell them apart at a glance.

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?

The phrasing 'a document you already have' clearly implies this tool is for local file contents rather than URLs, providing implicit routing against the sibling tool. It also instructs the agent on the invocation mechanism ('Pass the file contents as base64'). However, it never explicitly names convert_url_to_markdown or states a when-not-to-use condition, leaving the contrast to inference.

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

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

With no annotations provided, the description carries the full behavioral disclosure burden. It goes beyond the tool name by explaining that it extracts the main article content from web pages and preserves tables, and it lists supported document types. It does not mention failure modes, rate limits, or authentication, but for a read-only fetch/convert operation the key behaviors are disclosed.

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?

Two sentences, no filler. The main action is front-loaded and the second sentence adds meaningful behavioral detail about article extraction and table preservation.

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 single-parameter tool with no output schema or annotations, the description provides sufficient context: input types, extraction behavior, and output format (markdown). The only gap is that it does not mention the sibling tool or how the result is returned (text vs. file), so it is complete but not maximally so.

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 fully documents the url parameter at 100% coverage, so the baseline is a 3. The description adds additional meaning by enumerating input types ('web page, PDF, DOCX, etc.'), which clarifies what URLs the tool accepts beyond the schema's generic 'document or page'.

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 action ('Fetch a URL ... and convert it to clean, LLM-ready markdown') and names the resource (URL) and supported formats (web page, PDF, DOCX). It is specific and understandable, but it does not explicitly differentiate from the sibling convert_document_to_markdown, so it earns a 4 rather than a 5.

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?

The description implies usage: this tool is for URLs, while the sibling convert_document_to_markdown likely handles document files. However, there is no explicit statement about when to choose this tool over the sibling, nor any exclusions. Since the usage is only implied, not explicitly articulated, it scores a 3.

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