MCP Server search-fhir-resources - Query parameter not recognized

[stefan-sigle]

When trying to search for Patient resources via the MCP Tool search-fhir-resources with MCP Inspector v0.17.2 the query parameter is not recognized.

In the code the query parameter is supposed to be a Map but while debuggin we found that the parameter is returned as string (see

hapi-fhir-jpaserver-starter/src/main/java/ca/uhn/fhir/jpa/starter/mcp/RequestBuilder.java

Line 44 in ccf97bd

if (config.get("query") instanceof Map<?, ?> q) {

).

This could be fixed by creating a HashMap from the incoming query string, but i suppose it needs a different treatment to handle both a string and a hashmap. Here is a codesnippet that allowed us to use the query parameter as intended:

				Map<String, String> sp = new HashMap<>();

				for (String pair : config.get("query").toString().split(",")) {
					String[] keyValue = pair.split("=", 2);
					if (keyValue.length == 2) {
						sp.put(keyValue[0], keyValue[1]);
					}
				} 

cc @zsebedits