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badchars

darknet-mcp-server

by badchars

tor_scrape_onion

Scrape a .onion URL via Tor to obtain structured page data including title, all links, and body text.

Instructions

Fetch and parse a .onion site via Tor. Returns structured data: page title, all links, and visible body text. Requires running Tor daemon.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesThe .onion URL to scrape
Behavior4/5

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 the behavioral trait of requiring a running Tor daemon and specifies the output structure. However, it does not discuss potential errors, timeouts, or size limits.

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 concise sentences that efficiently convey the tool's function, output, and a key requirement, with no superfluous content.

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 simplicity (one parameter, no output schema), the description adequately covers purpose, input, output structure, and a critical prerequisite (Tor daemon), making it wholly complete for an agent.

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 only parameter 'url' is fully described in the schema ('The .onion URL to scrape'). The description does not add significant meaning beyond the schema, as 'onion' is already implied by the tool name.

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 fetches and parses a .onion site via Tor, and specifies the returned structured data (page title, links, body text). It distinguishes itself from siblings like tor_fetch_onion and tor_search_onion through the parsing aspect.

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 mentions a requirement (Tor daemon) but does not provide explicit guidance on when to use this tool versus alternative sibling tools like tor_fetch_onion or tor_search_onion.

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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