search_repositories

THE RISK

Low Risk

Why search_repositories needs a policy

This tool performs a search query to find and list repositories, which is a read-only operation with no side effects. It matches the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch).' The blast radius is minimal as it only returns publicly discoverable information.

From the tool's definition Tool name 'search_repositories' and description 'Search for GitHub repositories' indicate a query operation that retrieves repository metadata without modifying or executing anything.

Documented attack patterns abuse exactly the kind of access search_repositories gives an agent:

POLICY

How to control search_repositories

PolicyLayer is an MCP gateway — it sits between your AI agents and GitHub MCP Server Plus, and nothing reaches the server without passing your rules. This is the rule we recommend for search_repositories:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "search_repositories": {}
  }
}

search_repositories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register GitHub MCP Server Plus — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More GitHub MCP Server Plus tools

Write add_issue_comment Add a comment to an existing issue Write create_branch Create a new branch in a GitHub repository Write create_issue Create a new issue in a GitHub repository Write create_or_update_file Create or update a single file in a GitHub repository Write create_pull_request Create a new pull request in a GitHub repository Write create_repository Create a new GitHub repository in your account Write fork_repository Fork a GitHub repository to your account or specified organization Write push_files_content Push multiple files with direct content to a GitHub repository in a single commit

All 18 GitHub MCP Server Plus tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about search_repositories

What does the search_repositories tool do? +

Search for GitHub repositories. It is categorised as a Read tool in the GitHub MCP Server Plus MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_repositories? +

Register the GitHub MCP Server Plus MCP server in PolicyLayer and add a rule for search_repositories: 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 GitHub MCP Server Plus. Nothing to install.

What risk level is search_repositories? +

search_repositories is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit search_repositories? +

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

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

search_repositories is provided by the GitHub MCP Server Plus MCP server (phialsbasement/mcp-github-server-plus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every GitHub MCP Server Plus tool call.

Start from GitHub MCP Server Plus, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →