write_user_preferences

A write tool on the Metis Public Health MCP server.

SERVERMetis Public Health SOURCEsveritg/metis_ph

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/sveritg-metis-ph/write-user-preferences.md

WHAT IT DOES

What write_user_preferences does on Metis Public Health

AI agents use write_user_preferences to create or update resources in Metis Public Health, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Metis Public Health environment.

RISK

Why write_user_preferences is rated Medium

This tool modifies user preferences, which is a reversible Write operation rather than destructive. The empty description lowers confidence slightly, but the naming convention in the context of a research companion (where sibling tools include 'add_memory_entry', 'add_glossary_term') strongly suggests preference configuration.

From the tool's definition Tool name 'write_user_preferences' indicates creating or modifying user preference settings. The verb 'write' combined with 'user_preferences' suggests reversible data modification typical of configuration or profile updates.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs write_user_preferences safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Metis Public Health, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For write_user_preferences, this is the rule to start with:

write_user_preferences Rate-limited

write_user_preferences 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": {
    "write_user_preferences": {
      "limits": [
        {
          "counter": "write_user_preferences_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Metis Public Health, apply this rule, and every write_user_preferences call is checked against it from then on.

FAQ

Questions about write_user_preferences

What does the write_user_preferences tool do? +

write_user_preferences is a write tool on the Metis Public Health MCP server. It is categorised as a Write tool in the Metis Public Health MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on write_user_preferences? +

Register the Metis Public Health MCP server in PolicyLayer and add a rule for write_user_preferences: 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 Metis Public Health. Nothing to install.

What risk level is write_user_preferences? +

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

Can I rate-limit write_user_preferences? +

Yes. Add a rate_limit block to the write_user_preferences 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 write_user_preferences completely? +

Set action: deny in the PolicyLayer policy for write_user_preferences. 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 write_user_preferences? +

write_user_preferences is provided by the Metis Public Health MCP server (sveritg/metis_ph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Metis Public Health, and thousands of servers like it.

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All 277 Metis Public Health tools →

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write_file on 0sec →team_manager_write_memory on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →