get_vector_from_hash
AI agents call get_vector_from_hash to retrieve information from Redis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves vector data from a Redis hash without modifying, deleting, or executing arbitrary operations. The 'get' prefix is characteristic of Read category tools. Although the description is empty, the naming convention and sibling tools (get, get_index_info, get_indexes) strongly suggest a read-only query operation with no side effects.
From the tool's definition Tool name 'get_vector_from_hash' with 'get' prefix indicates data retrieval. Server context shows this tool operates within Redis's hash data structure operations alongside other read operations like 'get' and 'get_indexes'.
Attacks that exploit this kind of access
get_vector_from_hash. It is categorised as a Read tool in the Redis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Redis MCP Server MCP server in PolicyLayer and add a rule for get_vector_from_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 Redis MCP Server. Nothing to install.
get_vector_from_hash 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_vector_from_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.
Set action: deny in the PolicyLayer policy for get_vector_from_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.
get_vector_from_hash is provided by the Redis MCP Server MCP server (yuchenhui/mcp-redis). 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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