AI agents call jsr_get_package_dependencies to retrieve information from JSR MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves dependency information for a package version. It performs a read-only operation that does not modify, delete, or execute anything. The verb 'Get' confirms data retrieval with no destructive or modifying capability. Blast radius if misused is minimal—exposing package dependency metadata poses low security risk.
From the tool's definition Tool name 'jsr_get_package_dependencies' and description 'Get the dependencies of a specific package version' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get the dependencies of a specific package version. It is categorised as a Read tool in the JSR MCP MCP Server, which means it retrieves data without modifying state.
Register the JSR MCP server in PolicyLayer and add a rule for jsr_get_package_dependencies: 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 JSR MCP. Nothing to install.
jsr_get_package_dependencies 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 jsr_get_package_dependencies 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 jsr_get_package_dependencies. 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.
jsr_get_package_dependencies is provided by the JSR MCP server (wyattjoh/jsr-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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