get-entry-by-hash · Lineage MCP Server MCP: Risk & Policy

WHAT IT DOES

What get-entry-by-hash does on Lineage MCP Server

AI agents call get-entry-by-hash to retrieve information from Lineage MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get-entry-by-hash needs a policy

The 'get-' prefix and context of sibling read-only blockchain query tools indicate this retrieves data without side effects. No evidence suggests data modification, deletion, code execution, or financial operations. While the empty description prevents higher confidence, the naming pattern and server context strongly point to a read operation.

From the tool's definition Tool name 'get-entry-by-hash' suggests a retrieval operation (read pattern: 'get-'). Sibling tools on the server include fetch-balance, fetch-transactions, get-balance, get-block-by-number, get-latest-block, get-transaction-by-hash—all read-only query…

Attacks that exploit this kind of access

Questions about get-entry-by-hash

What does the get-entry-by-hash tool do? +

get-entry-by-hash. It is categorised as a Read tool in the Lineage MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-entry-by-hash? +

Register the Lineage MCP Server MCP server in PolicyLayer and add a rule for get-entry-by-hash: 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 Lineage MCP Server. Nothing to install.

What risk level is get-entry-by-hash? +

get-entry-by-hash is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-entry-by-hash? +

Yes. Add a rate_limit block to the get-entry-by-hash 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.

How do I block get-entry-by-hash completely? +

Set action: deny in the PolicyLayer policy for get-entry-by-hash. 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.

What MCP server provides get-entry-by-hash? +

get-entry-by-hash is provided by the Lineage MCP Server MCP server (lineage-foundation/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.