AI agents use close_issue to create or update resources in Redmine MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Redmine MCP Server environment.
This tool creates or modifies data reversibly. Closing an issue changes its status to completed but does not delete or destroy the issue—it remains in the system and can be reopened or modified later. This is a reversible state change operation, fitting the Write category.
From the tool's definition Tool description states 'Close the issue (set to completed status)' which modifies the state of an issue by changing its status field.
Documented attack patterns abuse exactly the kind of access close_issue gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Redmine MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for close_issue:
{
"version": "1",
"default": "deny",
"tools": {
"close_issue": {
"limits": [
{
"counter": "close_issue_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}close_issue stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Close the issue (set to completed status). It is categorised as a Write tool in the Redmine MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Redmine MCP Server MCP server in PolicyLayer and add a rule for close_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 Redmine MCP Server. Nothing to install.
close_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 close_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 close_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.
close_issue is provided by the Redmine MCP Server MCP server (snowild/redmine-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Redmine MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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35 Redmine MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.