AI agents call lobsters_tag to retrieve information from Devfeed without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches stories from Lobsters filtered by tag, which is a read-only retrieval operation. There are no indications of data modification, deletion, code execution, or financial transactions. The blast radius of misuse is minimal—worst case would be retrieving irrelevant stories or excessive requests, which is a standard read operation risk.
From the tool's definition Tool name 'lobsters_tag' and description 'Get Lobsters stories by tag' indicate a query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
Get Lobsters stories by tag. It is categorised as a Read tool in the Devfeed MCP Server, which means it retrieves data without modifying state.
Register the Devfeed MCP server in PolicyLayer and add a rule for lobsters_tag: 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 Devfeed. Nothing to install.
lobsters_tag 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 lobsters_tag 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 lobsters_tag. 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.
lobsters_tag is provided by the Devfeed MCP server (upgpt-ai/devfeed-mcp). 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.
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