// SCAN REPORT

Zero Core Tools

9 tools. 1 can modify or destroy data without limits.

1 write tool that can modify data. Rate limits recommended.

Last updated: 6 Jun 2026

1 can modify or destroy data

8 read-only

9 tools total

Free to start. No card required.

TOOL MAP

Read (8) Write / Execute (1) Destructive / Financial (0)

CONTEXT-WINDOW COST

1,044 tokens of tool definitions, loaded on every request

0.5% of a 200k context window

188 heaviest tool: generate_content

Full per-tool breakdown → Model it in the token calculator →

WHAT CAN GO WRONG

Write operations (generate_content) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.

RECOMMENDED RULES

Rate limit write operations

{
  "generate_content": {
    "limits": [
      {
        "counter": "generate_content_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "analyze_sentiment": {
    "limits": [
      {
        "counter": "analyze_sentiment_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

ALL 9 ZERO CORE TOOLS TOOLS

WRITE 1 tools

Write generate_content

READ 8 tools

Read analyze_sentiment Read extract_structured_data Read health Read list_tools Read review_code Read scrape_url Read screenshot_url Read search_web

FAQ

How do I prevent bulk modifications through Zero Core Tools? +

The Zero Core Tools server has 1 write tools including generate_content. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Zero Core Tools.

How many tools does the Zero Core Tools MCP server expose? +

9 tools across 2 categories: Read, Write. 8 are read-only. 1 can modify, create, or delete data.

How do I enforce a policy on Zero Core Tools? +

Register the Zero Core Tools MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Zero Core Tools tool call.

Deterministic rules across all 9 Zero Core Tools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

SECURE ZERO CORE TOOLS →

Free to start. No card required.

4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

Zero Core Tools

// TOOL MAP

// CONTEXT-WINDOW COST

// WHAT CAN GO WRONG

// RECOMMENDED RULES

// ALL 9 ZERO CORE TOOLS TOOLS

// FAQ