# c4_search

A read tool on the C4REQBER MCP server.

Agent View of the PolicyLayer registry record for `c4_search`. HTML page: https://policylayer.com/tools/c4reqber/c4-search

## Facts

- Tool: `c4_search`
- Server: C4REQBER (`C4MIND/C4REQBER`) — https://policylayer.com/tools/c4reqber.md
- Homepage: https://github.com/C4MIND/C4REQBER
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "c4_search",
    "arguments": {}
  }
}
```

## Why c4_search is rated Low

Search tools retrieve or query data without modifying state. Given the empty description and the read-only nature of the server, this is classified as a Read operation with low severity. Confidence is moderate (0.7) due to the missing tool description, which would normally provide more specific evidence of the tool's exact behavior.

From the tool's own definition: "Tool name 'c4_search' suggests a search operation. Server description indicates this is a 'Read-only mirror' with a 'discovery pipeline', and 'agent_search' is listed as a sibling tool, implying search functionality is part of the read-only interface."

## Use case

AI agents call c4_search to retrieve information from C4REQBER without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches C4REQBER:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "c4_search": {}
  }
}
```

## Other tools on C4REQBER (31)

- `c4_agent_query` — Execute — https://policylayer.com/tools/c4reqber/c4-agent-query.md
- `c4_agent_solve` — Execute — https://policylayer.com/tools/c4reqber/c4-agent-solve.md
- `c4_agent_spawn` — Execute — https://policylayer.com/tools/c4reqber/c4-agent-spawn.md
- `c4_agent_turbo` — Execute — https://policylayer.com/tools/c4reqber/c4-agent-turbo.md
- `c4_codegen` — Execute — https://policylayer.com/tools/c4reqber/c4-codegen.md
- `blast_auto` — Other — https://policylayer.com/tools/c4reqber/blast-auto.md
- `blast_flash` — Other — https://policylayer.com/tools/c4reqber/blast-flash.md
- `blast_turbo` — Other — https://policylayer.com/tools/c4reqber/blast-turbo.md
- `blast_turbofactory` — Other — https://policylayer.com/tools/c4reqber/blast-turbofactory.md
- `c4_bayesian` — Other — https://policylayer.com/tools/c4reqber/c4-bayesian.md
- `c4_causal` — Other — https://policylayer.com/tools/c4reqber/c4-causal.md
- `c4_meta` — Other — https://policylayer.com/tools/c4reqber/c4-meta.md
- `c4_social` — Other — https://policylayer.com/tools/c4reqber/c4-social.md
- `c4_transfer` — Other — https://policylayer.com/tools/c4reqber/c4-transfer.md
- `c4_triz` — Other — https://policylayer.com/tools/c4reqber/c4-triz.md
- `agent_fingerprint` — Read — https://policylayer.com/tools/c4reqber/agent-fingerprint.md
- `agent_process` — Read — https://policylayer.com/tools/c4reqber/agent-process.md
- `agent_search` — Read — https://policylayer.com/tools/c4reqber/agent-search.md
- `agent_solve` — Read — https://policylayer.com/tools/c4reqber/agent-solve.md
- `blast_solve` — Read — https://policylayer.com/tools/c4reqber/blast-solve.md
- `c4_agent_poll` — Read — https://policylayer.com/tools/c4reqber/c4-agent-poll.md
- `c4_agent_skills` — Read — https://policylayer.com/tools/c4reqber/c4-agent-skills.md
- `c4_agent_soul` — Read — https://policylayer.com/tools/c4reqber/c4-agent-soul.md
- `c4_autoresearch` — Read — https://policylayer.com/tools/c4reqber/c4-autoresearch.md
- `c4_chain` — Read — https://policylayer.com/tools/c4reqber/c4-chain.md
- `c4_fingerprint` — Read — https://policylayer.com/tools/c4reqber/c4-fingerprint.md
- `c4_prove` — Read — https://policylayer.com/tools/c4reqber/c4-prove.md
- `c4_simulate` — Read — https://policylayer.com/tools/c4reqber/c4-simulate.md
- `c4_solve` — Read — https://policylayer.com/tools/c4reqber/c4-solve.md
- `c4_verify` — Read — https://policylayer.com/tools/c4reqber/c4-verify.md
- …and 1 more: https://policylayer.com/tools/c4reqber.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=c4reqber · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/c4reqber