patch_package \u00b7 POST /patchPackage/searchByFields \u2014 Get object by connection. Required: from, size, q.
AI agents call patch_package_search_by_fields to retrieve information from Vicarius vRx MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite using HTTP POST, the tool is described as a search/get operation that retrieves patch package data by fields. The server description also notes 'read-only safety enforcement'. No creation, modification, or deletion is implied. Severity is low as it only exposes read access to patch package information.
From the tool's definition 'Get object by connection' — the operation retrieves/searches patch package records using fields as filter criteria; uses POST for querying but described as a search/get operation
Attacks that exploit this kind of access
patch_package \u00b7 POST /patchPackage/searchByFields \u2014 Get object by connection. Required: from, size, q. It is categorised as a Read tool in the Vicarius vRx MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vicarius vRx MCP Server MCP server in PolicyLayer and add a rule for patch_package_search_by_fields: 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 Vicarius vRx MCP Server. Nothing to install.
patch_package_search_by_fields 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 patch_package_search_by_fields 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 patch_package_search_by_fields. 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.
patch_package_search_by_fields is provided by the Vicarius vRx MCP Server MCP server (space-c0wboy/vicarius-vrx-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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