PowerShell Requires Chilkat v11.6.0+

Call a Tool on an MCP Server

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.

Background. The members of the arguments object are defined by the tool's input schema, which is reported by ListTools. This example uses the public, no-authentication Microsoft Learn MCP server.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$mcp = New-Object Chilkat.Mcp

#  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 -eq $false) {
    $($mcp.LastErrorText)
    exit
}

#  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.
$args = New-Object Chilkat.JsonObject
$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.
$result = New-Object Chilkat.JsonObject
$success = $mcp.CallTool("microsoft_docs_search",$args,$result)
if ($success -eq $false) {
    $($mcp.LastErrorText)
    exit
}

$result.EmitCompact = $false
$($result.Emit())
#  JSON parsing code for this result can be generated at Chilkat's online tool:
#  https://tools.chilkat.io/jsonParse