Lightweight search returning only NCT IDs and minimal metadata for discovery. This tool performs a lightweight search that returns only the NCT IDs and minimal metadata for the purpose of discovering relevant trials. Input: - conditions: A list of medical conditions to search for. - interventions...
Part of the Clinical Trials Data Server server.
Free to start. No card required.
AI agents call search_trials_nct_ids_only to retrieve information from Clinical Trials Data Server 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 search_trials_nct_ids_only 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": {
"search_trials_nct_ids_only": {}
}
}See the full Clinical Trials Data Server policy for all 12 tools.
These attack patterns abuse exactly the kind of access search_trials_nct_ids_only 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.
Lightweight search returning only NCT IDs and minimal metadata for discovery. This tool performs a lightweight search that returns only the NCT IDs and minimal metadata for the purpose of discovering relevant trials. Input: - conditions: A list of medical conditions to search for. - interventions: A list of interventions or treatments to search for. - sponsors: A list of sponsor organizations to search for. - terms: A list of general search terms. - max_studies: The maximum number of studies to return. Defaults to 100.. It is categorised as a Read tool in the Clinical Trials Data Server MCP Server, which means it retrieves data without modifying state.
Register the Clinical Trials Data Server MCP server in PolicyLayer and add a rule for search_trials_nct_ids_only: 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 Clinical Trials Data Server. Nothing to install.
search_trials_nct_ids_only 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 search_trials_nct_ids_only 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 search_trials_nct_ids_only. 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.
search_trials_nct_ids_only is provided by the Clinical Trials Data Server MCP server (plainyogurt21/clintrials-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Clinical Trials Data Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.