Call a Tool on an MCP Server

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Demonstrates Mcp.CallTool, which calls the MCP tools/call method for a named tool, passing a JSON arguments object and receiving the tool's result. The example calls the Microsoft Learn microsoft_docs_search tool.

Tip: Code to parse the returned JSON can be generated with Chilkat's online tool at https://tools.chilkat.io/jsonParse.

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    CkMcp mcp = new CkMcp();

    //  Connect to a public MCP (Model Context Protocol) server over its Streamable HTTP endpoint.  The
    //  Microsoft Learn MCP server is public and requires no authentication.
    success = mcp.Connect("https://learn.microsoft.com/api/mcp");
    if (success == false) {
        Log.i(TAG, mcp.lastErrorText());
        return;
        }

    //  Build the tool's input arguments.  The members required depend on the tool's input schema (see
    //  ListTools).  Here the Microsoft Learn "microsoft_docs_search" tool takes a search query.
    CkJsonObject args = new CkJsonObject();
    args.UpdateString("query","How do I create an Azure storage account?");

    //  Call the MCP tools/call method for the named tool.  The tool's result is placed in the result
    //  JsonObject.
    CkJsonObject result = new CkJsonObject();
    success = mcp.CallTool("microsoft_docs_search",args,result);
    if (success == false) {
        Log.i(TAG, mcp.lastErrorText());
        return;
        }

    result.put_EmitCompact(false);
    Log.i(TAG, result.emit());
    //  JSON parsing code for this result can be generated at Chilkat's online tool:
    //  https://tools.chilkat.io/jsonParse

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}