tree_sha

The SHA1 value or ref (branch or tag) name of the tree. Defaults to the repository's default branch (string, optional)

SERVERGitHub SOURCEoci:ghcr.io/aifity/omnigit-mcp:0.5.0

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-aifity-omnigit-mcp/tree-sha.md

WHAT IT DOES

What tree_sha does on GitHub

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

RISK

Why tree_sha is rated Low

This tool provides read-only access to repository metadata (tree SHA or branch/tag references). It retrieves existing data with no side effects, no code execution, and no data modification. It is a foundational query parameter used to identify which version of repository code to examine.

From the tool's definition Tool retrieves or references a SHA1 value or tree ref (branch or tag) from a repository without modifying data. The description indicates this is a parameter for querying tree information, defaulting to the repository's default branch.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs tree_sha safely

PolicyLayer is an MCP gateway: it sits between your AI agents and GitHub, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For tree_sha, this is the rule to start with:

tree_sha Allowed

tree_sha is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect GitHub, apply this rule, and every tree_sha call is checked against it from then on.

FAQ

Questions about tree_sha

What does the tree_sha tool do? +

The SHA1 value or ref (branch or tag) name of the tree. Defaults to the repository's default branch (string, optional). It is categorised as a Read tool in the GitHub MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on tree_sha? +

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

What risk level is tree_sha? +

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

Can I rate-limit tree_sha? +

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

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

tree_sha is provided by the GitHub MCP server (oci:ghcr.io/aifity/omnigit-mcp:0.5.0). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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