Get the latest LangChain version information from PyPI
AI agents call get_latest_version to retrieve information from LangChain Documentation MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and retrieves publicly available version information from PyPI. It has no side effects, cannot modify or delete data, and poses minimal security risk. Even if called with arbitrary arguments, the worst outcome would be returning outdated or null results. This is a straightforward Read operation.
From the tool's definition Tool name 'get_latest_version' and description 'Get the latest LangChain version information from PyPI' indicate a read-only query operation that retrieves version metadata from a public package repository without modifying any data.
Attacks that exploit this kind of access
Get the latest LangChain version information from PyPI. It is categorised as a Read tool in the LangChain Documentation MCP Server MCP Server, which means it retrieves data without modifying state.
Register the LangChain Documentation MCP Server MCP server in PolicyLayer and add a rule for get_latest_version: 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 LangChain Documentation MCP Server. Nothing to install.
get_latest_version 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 get_latest_version 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 get_latest_version. 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.
get_latest_version is provided by the LangChain Documentation MCP Server MCP server (liteobject/langchain-mcp-server). 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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