extract
Fetch a web page and return clean main-content text (no nav/ads/boilerplate).
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| url | Yes | ||
| max_chars | No |
Fetch a web page and return clean main-content text (no nav/ads/boilerplate).
| Name | Required | Description | Default |
|---|---|---|---|
| url | Yes | ||
| max_chars | No |
Changes observed during successful MCP inspections.
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 clean-text extraction but omits details like authentication needs, rate limits, or JavaScript execution. Adequate but not thorough.
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?
Single sentence, front-loaded with key purpose. No unnecessary words.
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?
Given no output schema and two parameters, the description covers the primary function but lacks details on return format, error handling, or size limits. Minimally adequate for a simple 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 0%. The description does not mention the 'url' or 'max_chars' parameters, leaving the agent to infer from schema alone. With low coverage, description should compensate but does not.
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 tool fetches a web page and returns clean main-content text, distinguishing it from sibling tools like 'news' or 'search' which serve different purposes.
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 use for extracting text from web pages but does not explicitly mention when to use vs alternatives or provide exclusions. No sibling differentiation is mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.