# tool_call

Dispatches to any tool in the catalogue. Most clients cap how many tools they will hold at once — Cursor drops everything past roughly forty across all servers combined — so only a core set is listed by default. Everything else is reachable here. Find a name with tool.search, check its shape with tool.describe, then call it through this.

Agent View of the PolicyLayer registry record for `tool_call`. HTML page: https://policylayer.com/tools/com-fluentedi-tools/tool-call

## Facts

- Tool: `tool_call`
- Server: Tools (`https://fluentedi.com/mcp`) — https://policylayer.com/tools/com-fluentedi-tools.md
- Homepage: https://github.com/https://fluentedi.com/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 2 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `args` | object | no | Arguments for that tool. |
| `tool` | string | yes | Name of the tool to invoke. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "tool_call",
    "arguments": {
      "tool": "<tool>"
    }
  }
}
```

## Why tool_call is rated Medium

An AI agent can call tool_call faster than any human can review: one bad instruction and it creates or modifies resources in Tools by the hundred, each call as confident as the last.

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Tools:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "tool_call": {
      "limits": [
        {
          "counter": "tool_call_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Tools (16)

- `cron_next` — Execute — https://policylayer.com/tools/com-fluentedi-tools/cron-next.md
- `edi_build` — Execute — https://policylayer.com/tools/com-fluentedi-tools/edi-build.md
- `edi_parse` — Execute — https://policylayer.com/tools/com-fluentedi-tools/edi-parse.md
- `edi_validate` — Read — https://policylayer.com/tools/com-fluentedi-tools/edi-validate.md
- `hash` — Read — https://policylayer.com/tools/com-fluentedi-tools/hash.md
- `http_assert` — Read — https://policylayer.com/tools/com-fluentedi-tools/http-assert.md
- `http_check` — Read — https://policylayer.com/tools/com-fluentedi-tools/http-check.md
- `json_query` — Read — https://policylayer.com/tools/com-fluentedi-tools/json-query.md
- `json_repair` — Read — https://policylayer.com/tools/com-fluentedi-tools/json-repair.md
- `math_eval` — Read — https://policylayer.com/tools/com-fluentedi-tools/math-eval.md
- `time_diff` — Read — https://policylayer.com/tools/com-fluentedi-tools/time-diff.md
- `time_now` — Read — https://policylayer.com/tools/com-fluentedi-tools/time-now.md
- `time_window` — Read — https://policylayer.com/tools/com-fluentedi-tools/time-window.md
- `tool_describe` — Read — https://policylayer.com/tools/com-fluentedi-tools/tool-describe.md
- `tool_search` — Read — https://policylayer.com/tools/com-fluentedi-tools/tool-search.md
- `time_convert` — Write — https://policylayer.com/tools/com-fluentedi-tools/time-convert.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-fluentedi-tools · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-fluentedi-tools