update_database_cell · Fusebase MCP Server MCP

WHAT IT DOES

What update_database_cell does on Fusebase MCP Server

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

WHY IT NEEDS A POLICY

Why update_database_cell needs a policy

The tool creates or modifies data reversibly by updating a cell value. It does not delete data (which would be Destructive) or execute arbitrary code (which would be Execute). The blast radius is medium because incorrect cell updates could corrupt data integrity or introduce inconsistencies, but the operation is potentially reversible through other updates.

From the tool's definition Tool description states 'Set the value of a specific cell in a database row' — this is a direct modification operation that changes data in a database.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_database_cell Rate-limited

update_database_cell 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": {
    "update_database_cell": {
      "limits": [
        {
          "counter": "update_database_cell_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 Fusebase MCP Server, so you can run agents against it safely.

FAQ

Questions about update_database_cell

What does the update_database_cell tool do? +

Set the value of a specific cell in a database row. Use get_database_rows or get_database_data first to obtain the rowUuid and the column key (short opaque string like. It is categorised as a Write tool in the Fusebase 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 update_database_cell? +

Register the Fusebase MCP Server MCP server in PolicyLayer and add a rule for update_database_cell: 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 Fusebase MCP Server. Nothing to install.

What risk level is update_database_cell? +

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

Can I rate-limit update_database_cell? +

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

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

update_database_cell is provided by the Fusebase MCP Server MCP server (ryan-haver/fusebase-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.