Add headers for agents connecting to remote servers (#664)

* remove references to dataclass objects

* Fix a copy-paste error.

* remove extra file

* Create placeholders for LLM pages

* rename to MCP

* complete rename

* remove old file

* Changes from Keyur

* Add target tag

* Rewording suggested by Keyur

* Remove extraneous text

* Fix a copy-paste error.

* Migrate MCP docs to docsite

* Restructuring

* Remove unused file

* Add TOCs etc.

* Update var formatting

* comments from Keyur

* another change from Keyur

* Update mcp/index.md

Co-authored-by: Christie Ellks <calinc@google.com>

* Changes from Christie

* Apply suggestion from @clincoln8

Co-authored-by: Christie Ellks <calinc@google.com>

* More changes from Christie

* Changes from Dan

* Link fixes

* Remove MCP inspector info

* Add more context to agent dev doc

* fix formatting

* Create placeholders for LLM pages

* merge

* Slight rewording based on comment from Christie

* Lots of restructuring

* More work on Gemini CLI extension

* More changes

* more changes

* more changes

* Update mcp/run_tools.md

Co-authored-by: Christie Ellks <calinc@google.com>

* implement suggestions from Christie

* Add some bullets to comparison section

* Fix update section

* rename "prompt" to "context"

* add mention of Gemini CLI extension for custom DC

* Update custom DC vars procedure

* Remove reference to .env file in extension run

* slight fix

* Add section on creating a custom extension

* Some rewording

* Fix formatting

* More revisions and edits

* Remove file from other branch

* minor edits

* Add Windows command

* Add warning about nvm

* Remove warning

* Remove reference to node.js

* Update mcp/run_tools.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Add required header to connect to a remote server

* Add additional accept type

* Add code for sample agent headers

* Apply suggestion from @gemini-code-assist[bot]

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: Christie Ellks <calinc@google.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: 3 people

mcp/index.md

@@ -23,6 +23,8 @@ At this time, there is no centrally deployed server; you run your own server, an
 
 ![alt text](/assets/images/mcp.png)
 
+You can run the server and client locally, or you can run the server and client on different machines.
+
 ## Tools
 
 The server currently supports the following tools:

mcp/run_tools.md

@@ -230,7 +230,11 @@ To configure Gemini CLI to recognize the Data Commons server, edit the relevant
    {
     "mcpServers": {
         "datacommons-mcp": {
-            "httpUrl": "http://<var>HOST</var>:<var>PORT</var>/mcp"
+            "httpUrl": "http://<var>HOST</var>:<var>PORT</var>/mcp",
+            "headers": {
+               "Content-Type": "application/json",
+               "Accept": "application/json, text/event-stream"
+            },
             // other settings as above
          }
       }
@@ -313,10 +317,15 @@ root_agent = LlmAgent(
       # ...
       tools=[McpToolset(
          connection_params=StreamableHTTPConnectionParams(
-            url=f"http://<host>:<port>/mcp"
-         )
-      )],
-   )
+            url=f"http://<host>:<port>/mcp",
+            headers={
+               "Content-Type": "application/json",
+               "Accept": "application/json, text/event-stream"
+            },
+         ),
+      )
+      ],
+)
 ```
 
 ## Sample queries