Explains why US stocks moved today. Answers 'why did Tesla drop?', 'what's going on with NVDA?', 'why is Apple down?', 'what happened to Google stock?' with AI analysis citing news catalysts, earnings reports, and analyst actions. Flags mystery moves with no obvious reason. Handles: price drops, ...
Part of the Stock Catalyst MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents may call stock-moves-explained to permanently remove or destroy resources in Stock Catalyst. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. Intercept blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call stock-moves-explained in a loop, permanently destroying resources in Stock Catalyst. There is no undo for destructive operations. Intercept blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
tools:
stock-moves-explained:
rules:
- action: deny
reason: "Blocked by default — enable with approval"See the full Stock Catalyst policy for all 1 tools.
Agents calling destructive-class tools like stock-moves-explained have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Destructive risk category across the catalogue. The same policy patterns (deny, require_approval) apply to each.
stock-moves-explained is one of the critical-risk operations in Stock Catalyst. For the full severity-focused view — only the critical-risk tools with their recommended policies — see the breakdown for this server, or browse all critical-risk tools across every MCP server.
Explains why US stocks moved today. Answers 'why did Tesla drop?', 'what's going on with NVDA?', 'why is Apple down?', 'what happened to Google stock?' with AI analysis citing news catalysts, earnings reports, and analyst actions. Flags mystery moves with no obvious reason. Handles: price drops, price surges, earnings impacts, analyst upgrades/downgrades, sector trends, market selloffs. Covers S&P 500, NASDAQ 100, Dow 30 (~550 stocks). NOT for: price quotes, trading advice, predictions, crypto, forex, or stocks outside major US indices.. It is categorised as a Destructive tool in the Stock Catalyst MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Add a rule in your Intercept YAML policy under the tools section for stock-moves-explained. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Stock Catalyst MCP server.
stock-moves-explained 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 stock-moves-explained rule in your Intercept 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 Intercept policy for stock-moves-explained. 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.
stock-moves-explained is provided by the Stock Catalyst MCP server (wtf-just-happened/stock-moves-explained). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept