set_vector_in_hash · Redis MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_vector_in_hash does on Redis MCP Server

AI agents use set_vector_in_hash to create or update resources in Redis MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Redis MCP Server environment.

WHY IT NEEDS A POLICY

Why set_vector_in_hash needs a policy

This tool creates or modifies data in Redis (storing vectors in hash structures). It is reversible through other Write operations (update/overwrite). The severity is high because an AI agent could corrupt or overwrite critical vector embeddings that power search functionality, affecting data integrity and application behavior, though it is not irreversible (Write rather than Destructive) and does not directly move…

From the tool's definition Tool name 'set_vector_in_hash' indicates setting/storing a vector in a hash data structure. The server description confirms it 'Enables AI agents to manage...data in Redis' with support for 'hashes...and vector search.' The empty tool description is…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_vector_in_hash Rate-limited

set_vector_in_hash stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_vector_in_hash": {
      "limits": [
        {
          "counter": "set_vector_in_hash_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Redis MCP Server, so you can run agents against it safely.

FAQ

Questions about set_vector_in_hash

What does the set_vector_in_hash tool do? +

set_vector_in_hash. It is categorised as a Write tool in the Redis MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_vector_in_hash? +

Register the Redis MCP Server MCP server in PolicyLayer and add a rule for set_vector_in_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.

What risk level is set_vector_in_hash? +

set_vector_in_hash is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_vector_in_hash? +

Yes. Add a rate_limit block to the set_vector_in_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 set_vector_in_hash completely? +

Set action: deny in the PolicyLayer policy for set_vector_in_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 set_vector_in_hash? +

set_vector_in_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.