Acquire a lock on a specific issue without going through priority selection. Use before opening a branch when you already know the issue number.
AI agents use claim_issue to create or update resources in MCP GitHub Issue Priority Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP GitHub Issue Priority Server environment.
The tool acquires a lock on an issue, which is a state modification operation. This is a Write-category action because it reversibly claims/reserves an issue without deleting or permanently altering data. Severity is medium because improper locking could cause workflow conflicts or prevent legitimate work, but the effect is recoverable (locks can be released).
From the tool's definition Tool description states 'Acquire a lock on a specific issue', indicating it modifies state by claiming/locking a resource. The workflow context shows this is part of a multi-phase system where claiming is a state transition (issue assignment/locking).
Attacks that exploit this kind of access
Acquire a lock on a specific issue without going through priority selection. Use before opening a branch when you already know the issue number. It is categorised as a Write tool in the MCP GitHub Issue Priority Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP GitHub Issue Priority Server MCP server in PolicyLayer and add a rule for claim_issue: 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 MCP GitHub Issue Priority Server. Nothing to install.
claim_issue is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the claim_issue 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.
Set action: deny in the PolicyLayer policy for claim_issue. 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.
claim_issue is provided by the MCP GitHub Issue Priority Server MCP server (steiner385/mcp-git-issue-priority). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →