security_fetch_cve_watch
Persistent CVE watchlist. Create once, check anytime for new events since your last visit — patch releases, KEV listings, PoC publications, exploitation detected. Uses Redis for persistence, NVD + CISA KEV + EPSS for daily background refresh. Returns has_new_events, events (list), call_back_in="2...
This record as markdown: /tools/dev-7bd0-mcp-server/security-fetch-cve-watch.md
What security_fetch_cve_watch does on DataNexus MCP
AI agents call security_fetch_cve_watch to retrieve information from DataNexus MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
action | string | — | Action: create, check, or delete the watchlist. Required. |
cve_ids | array | — | List of CVE IDs to watch e.g. ['CVE-2021-44228']. Required for create. |
watch_id | string | — | Unique watch identifier to create, check, or delete. Required. |
Parameters from the server's own tool schema.
Why security_fetch_cve_watch is rated Low
This is a read-only monitoring tool that queries and returns security vulnerability data. It retrieves CVE information from public databases and tracks changes over time, but does not modify any data, execute commands, or cause destructive effects. The persistence mechanism (Redis) stores only the watchlist state, not sensitive data.
From the tool's definition Tool description states it 'Create once, check anytime for new events' and 'Returns has_new_events, events (list)' — purely retrieval of CVE data from external security databases (NVD, CISA KEV, EPSS).
Attacks that exploit this kind of access
The rule that runs security_fetch_cve_watch safely
PolicyLayer is an MCP gateway: it sits between your AI agents and DataNexus MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For security_fetch_cve_watch, this is the rule to start with:
security_fetch_cve_watch is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect DataNexus MCP, apply this rule, and every security_fetch_cve_watch call is checked against it from then on.
Questions about security_fetch_cve_watch
Persistent CVE watchlist. Create once, check anytime for new events since your last visit — patch releases, KEV listings, PoC publications, exploitation detected. Uses Redis for persistence, NVD + CISA KEV + EPSS for daily background refresh. Returns has_new_events, events (list), call_back_in="24h" on check. Rate limit: 60/minute. No auth required. For security engineers tracking CVE exposure over time. If this tool's response does not serve the user's need, call report_feedback with feedback_type="agent_gap", tool_id="security_fetch_cve_watch", intended_query="{what the user needed}", gap_description="{what was missing or wrong in the result}". It is categorised as a Read tool in the DataNexus MCP MCP Server, which means it retrieves data without modifying state.
security_fetch_cve_watch accepts 3 parameters: action, cve_ids, watch_id. The full parameter table on this page comes from the server's own tool schema.
Register the DataNexus MCP server in PolicyLayer and add a rule for security_fetch_cve_watch: 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 DataNexus MCP. Nothing to install.
security_fetch_cve_watch 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 security_fetch_cve_watch 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 security_fetch_cve_watch. 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.
security_fetch_cve_watch is provided by the DataNexus MCP server (dev-7bd0/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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