识别页面使用的加密库名称和版本
AI agents call crypto_identify_library to retrieve information from Js Reverse without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs passive reconnaissance by identifying which cryptographic libraries (and their versions) are present on a webpage. It retrieves information about the environment without executing code, modifying data, or triggering external operations. This is characteristic of Read-category tools (query/fetch operations with no side effects).
From the tool's definition Tool name 'crypto_identify_library' and description '识别页面使用的加密库名称和版本' (identify the encryption library name and version used on the page) indicate inspection and enumeration of existing cryptographic libraries.
Attacks that exploit this kind of access
识别页面使用的加密库名称和版本. It is categorised as a Read tool in the Js Reverse MCP Server, which means it retrieves data without modifying state.
Register the Js Reverse MCP server in PolicyLayer and add a rule for crypto_identify_library: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Js Reverse. Nothing to install.
crypto_identify_library is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the crypto_identify_library rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for crypto_identify_library. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
crypto_identify_library is provided by the Js Reverse MCP server (jenn619/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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