remove_from_watchlist
AI agents call remove_from_watchlist to permanently remove resources in MCP YFinance Stock Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing an item from a watchlist is a destructive operation in the sense that it irreversibly deletes that entry from the list. While the blast radius is limited (only watchlist data is affected, no financial transactions or system commands), it is a deletion action. The empty description lowers confidence somewhat, but the naming pattern strongly implies removal/deletion of stored data.
From the tool's definition Tool name 'remove_from_watchlist' combined with sibling tool 'add_to_watchlist' implies deletion of an item from a persistent watchlist. Description is empty, so reasoning is inferred from name and context.
Attacks that exploit this kind of access
remove_from_watchlist. It is categorised as a Destructive tool in the MCP YFinance Stock Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the MCP YFinance Stock Server MCP server in PolicyLayer and add a rule for remove_from_watchlist: 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 YFinance Stock Server. Nothing to install.
remove_from_watchlist is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the remove_from_watchlist 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 remove_from_watchlist. 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.
remove_from_watchlist is provided by the MCP YFinance Stock Server MCP server (sauniket/mcp-yfinance-server). 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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