get_tag_signature

Get the X.509 signature of a signed tag (404 if unsigned)

SERVERGitlab Mcp SOURCE@zereight/mcp-gitlab

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-zereight-gitlab-mcp/get-tag-signature.md

WHAT IT DOES

What get_tag_signature does on Gitlab Mcp

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

RISK

Why get_tag_signature is rated Low

This tool retrieves cryptographic signature metadata from an existing git tag. It is a read-only query operation with no side effects. The return of a 404 for unsigned tags is consistent with a simple lookup. No data is created, modified, deleted, or executed.

From the tool's definition Tool name is 'get_tag_signature' and description states 'Get the X.509 signature of a signed tag', which is a retrieval operation. No modification, deletion, execution, or financial action is performed.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_tag_signature safely

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

get_tag_signature Allowed

get_tag_signature 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": {
    "get_tag_signature": {}
  }
}

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

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

FAQ

Questions about get_tag_signature

What does the get_tag_signature tool do? +

Get the X.509 signature of a signed tag (404 if unsigned). It is categorised as a Read tool in the Gitlab Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_tag_signature? +

Register the Gitlab MCP server in PolicyLayer and add a rule for get_tag_signature: 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 Gitlab Mcp. Nothing to install.

What risk level is get_tag_signature? +

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

Can I rate-limit get_tag_signature? +

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

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

get_tag_signature is provided by the Gitlab MCP server (@zereight/mcp-gitlab). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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