# `TMCP020` list_references_to returns referencing requirements

Query which requirements reference a given requirement and verify the response

:::{dropdown} Is a test for
:open: 
:icon: check-circle-fill
:color: primary

[`MCP007` List requirements referencing another](/requirements/MCP007)
:::
:::{dropdown} Automated in
:open: 
:icon: check-circle-fill
:color: success

{fab}`python` [`test_list_references_to_one`](https://github.com/agagniere/speky/blob/master/tests/test_mcp_server.py#L556)
:::
:::{dropdown} Source
:icon: file-code
:color: info

__Source file__: [`specs/mcp/test_07.yaml`](https://github.com/agagniere/speky/blob/master/specs/mcp/test_07.yaml)

__Loaded from__: [`speky_mcp`](https://github.com/agagniere/speky/blob/master/specs/mcp/mcp.toml)

:::

## Initial state
The expected state is the final state of
[`TMCP003` Initialize the MCP server](/tests/TMCP003)
## Procedure
### Step 1
The client calls `list_references_to` with ID `RF04`, which is referenced by `RF03`
```json
{
  "id": 2,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "list_references_to",
    "arguments": {"id": "RF04"}
  }
}

```
### Step 2
Verify the response contains RF03
```json
{
  "id": 2,
  "jsonrpc": "2.0",
  "result": {
    "structuredContent": {
      "requirements": [
        {
          "category": "non-functional",
          "id": "RF03",
          "short": "Number 3",
          "tags": ["foo", "bar:baz"]
        }
      ]
    }
  }
}

```