搜索临床试验。默认查询招募中且过去3个月内更新的试验，按更新时间降序返回30个最相关结果。支持根据关键词（如KRAS-12D）、疾病类型（如胰腺癌）、地理位置（国家/城市）等条件查询。
AI agents call search_clinical_trials to retrieve information from Clinical Trials MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs read-only searches and queries against ClinicalTrials.gov data, retrieving and filtering trial information based on various criteria (keywords, disease type, location). It has no side effects—it retrieves data without creating, modifying, deleting, or executing operations.
From the tool's definition Tool description indicates 'search' and 'query' operations that retrieve clinical trial information: 'searching clinical trials', 'returns 30 most relevant results', 'supports querying by keywords', 'disease type', 'geographic location'.
Documented attack patterns abuse exactly the kind of access search_clinical_trials gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Clinical Trials MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_clinical_trials:
{
"version": "1",
"default": "deny",
"tools": {
"search_clinical_trials": {}
}
}search_clinical_trials is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
搜索临床试验。默认查询招募中且过去3个月内更新的试验，按更新时间降序返回30个最相关结果。支持根据关键词（如KRAS-12D）、疾病类型（如胰腺癌）、地理位置（国家/城市）等条件查询。. It is categorised as a Read tool in the Clinical Trials MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Clinical Trials MCP Server MCP server in PolicyLayer and add a rule for search_clinical_trials: 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 MCP Server. Nothing to install.
search_clinical_trials 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_clinical_trials 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_clinical_trials. 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_clinical_trials is provided by the Clinical Trials MCP Server MCP server (pancrepal-xiaoyibao/xiaoyibao-clinical-trials-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Clinical Trials MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
3 Clinical Trials MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.