AI agents call linear_list_comments to retrieve information from Sage MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves existing comments associated with a Linear issue. It has no side effects, does not create, modify, or delete data, and does not execute external operations. It is a straightforward read/list operation, placing it in the Read category with low severity since the blast radius of misuse is minimal (data that should be readable anyway).
From the tool's definition Tool description states 'List comments on a Linear issue' — a retrieval operation with no modification or deletion of data.
Documented attack patterns abuse exactly the kind of access linear_list_comments gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for linear_list_comments:
{
"version": "1",
"default": "deny",
"tools": {
"linear_list_comments": {}
}
}linear_list_comments is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List comments on a Linear issue. It is categorised as a Read tool in the Sage MCP MCP Server, which means it retrieves data without modifying state.
Register the Sage MCP server in PolicyLayer and add a rule for linear_list_comments: 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 Sage MCP. Nothing to install.
linear_list_comments is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the linear_list_comments 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 linear_list_comments. 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.
linear_list_comments is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.