Get the most vulnerable counties in a state ranked by SVI score. Returns counties sorted by highest SVI percentile ranking for the specified theme. Useful for identifying priority areas for grants and community health interventions. Args: state: Two-letter US state abbreviation (e.g. 'WA', 'CA')....
Part of the CDC Social Vulnerability Index server.
Free to start. No card required.
AI agents call get_most_vulnerable to retrieve information from CDC Social Vulnerability Index without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_most_vulnerable only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_most_vulnerable": {}
}
}See the full CDC Social Vulnerability Index policy for all 4 tools.
These attack patterns abuse exactly the kind of access get_most_vulnerable gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Get the most vulnerable counties in a state ranked by SVI score. Returns counties sorted by highest SVI percentile ranking for the specified theme. Useful for identifying priority areas for grants and community health interventions. Args: state: Two-letter US state abbreviation (e.g. 'WA', 'CA'). theme: SVI theme to rank by. Options: 'overall', 'socioeconomic', 'household' (composition/disability), 'minority' (status/language), 'housing' (type/transportation). Default is 'overall'. limit: Number of counties to return (default 20, max 100).. It is categorised as a Read tool in the CDC Social Vulnerability Index MCP Server, which means it retrieves data without modifying state.
Register the CDC Social Vulnerability Index MCP server in PolicyLayer and add a rule for get_most_vulnerable: 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 CDC Social Vulnerability Index. Nothing to install.
get_most_vulnerable 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 get_most_vulnerable 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 get_most_vulnerable. 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.
get_most_vulnerable is provided by the CDC Social Vulnerability Index MCP server (https://mcp.olyport.com/cdc-svi/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 CDC Social Vulnerability Index tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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