# createCategory

Create a new category

Agent View of the PolicyLayer registry record for `createCategory`. HTML page: https://policylayer.com/tools/108yen-memo-mcp/createcategory

## Facts

- Tool: `createCategory`
- Server: Memo (`108yen/memo-mcp`) — https://policylayer.com/tools/108yen-memo-mcp.md
- Homepage: https://github.com/108yen/memo-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "createCategory",
    "arguments": {}
  }
}
```

## Why createCategory is rated Medium

This tool creates new data (a category) in the local memo database, which is reversible and has no side effects beyond the database itself. It fits the Write category as it creates data without destruction or external execution. Severity is low because creating a category has minimal blast radius—it doesn't affect existing data, financial systems, or trigger external operations.

From the tool's own definition: "Tool name 'createCategory' and description 'Create a new category' indicate a data creation operation that modifies the memo database by adding a new category entry."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Memo (10)

- `deleteCategory` — Destructive — https://policylayer.com/tools/108yen-memo-mcp/deletecategory.md
- `deleteMemo` — Destructive — https://policylayer.com/tools/108yen-memo-mcp/deletememo.md
- `getCategories` — Read — https://policylayer.com/tools/108yen-memo-mcp/getcategories.md
- `getCategory` — Read — https://policylayer.com/tools/108yen-memo-mcp/getcategory.md
- `getMemo` — Read — https://policylayer.com/tools/108yen-memo-mcp/getmemo.md
- `getMemos` — Read — https://policylayer.com/tools/108yen-memo-mcp/getmemos.md
- `searchMemos` — Read — https://policylayer.com/tools/108yen-memo-mcp/searchmemos.md
- `createMemo` — Write — https://policylayer.com/tools/108yen-memo-mcp/creatememo.md
- `updateCategory` — Write — https://policylayer.com/tools/108yen-memo-mcp/updatecategory.md
- `updateMemo` — Write — https://policylayer.com/tools/108yen-memo-mcp/updatememo.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=108yen-memo-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/108yen-memo-mcp