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stealth_tls_fingerprint_mimic

Synthesize genuine Chrome and Safari TLS Client Hello fingerprints (JA3/JA4) to prevent bot detection and blocking.

Instructions

Synthesizes JA3 and JA4 TLS Client Hello fingerprint configurations matching genuine Google Chrome and Apple Safari builds, preventing bot blocking. (0.045 USDC on Base L2)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
payloadYesInput parameters or JSON string payload for the tool execution
paymentSignatureNoBase L2 USDC micropayment signature or transaction hash for x402 settlement

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.4/5.0
Behavior2/5

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

No annotations are provided, so the description must carry the full behavioral burden. It mentions the cost (0.045 USDC) and that it synthesizes configurations, but does not disclose whether the operation is read-only, what side effects exist, what the return value looks like, or any limitations. The description is too minimal to fully inform the agent about the tool's behavior.

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 a single, tightly-worded sentence that front-loads the action and purpose, with the cost noted in parentheses. No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema, and the description does not explain what the tool returns or how to construct the payload. It also omits details about the payment flow (e.g., how to provide the signature). For a tool with only vague schema descriptions and no output schema, the description is insufficient for an agent to call it correctly.

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?

Schema description coverage is 100%, so both parameters are already documented. The description adds no extra meaning about the parameters (e.g., what the payload should contain or how to structure the payment signature). Baseline 3 is appropriate since the schema covers the parameters.

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 verb 'Synthesizes' and the resource 'JA3 and JA4 TLS Client Hello fingerprint configurations' matching specific browsers, with a clear purpose (preventing bot blocking). It is specific and distinct from all sibling tools, none of which relate to TLS fingerprinting.

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 purpose implies when to use it (to avoid bot blocking), but there is no explicit guidance on when to use it vs alternatives, nor any exclusions. Since no sibling tool serves a similar function, the lack of explicit alternatives is less critical, but the description could still state 'Use this when you need to mimic a browser TLS fingerprint'.

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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