# `TMCP047` least_tested_requirements filtered by tag

Call least_tested_requirements with a tag filter and verify only tagged requirements appear

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

[`MCP012` List requirements sorted by test coverage](/requirements/MCP012)
:::
:::{dropdown} Automated in
:open: 
:icon: check-circle-fill
:color: success

{fab}`python` [`test_filter_by_tag`](https://github.com/agagniere/speky/blob/master/tests/test_mcp_server.py#L856)
:::
:::{dropdown} Source
:icon: file-code
:color: info

__Source file__: [`specs/mcp/test_12.yaml`](https://github.com/agagniere/speky/blob/master/specs/mcp/test_12.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 `least_tested_requirements` with tag `foo`
```json
{
  "id": 2,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "least_tested_requirements",
    "arguments": {"tag": "foo"}
  }
}

```
### Step 2
Verify only RF03 is returned, as it is the only requirement tagged with `foo`
```json
{
  "id": 2,
  "jsonrpc": "2.0",
  "result": {
    "structuredContent": {
      "requirements": [
        {"id": "RF03", "category": "non-functional", "short": "Number 3", "test_plans": 2, "automated_test_plans": 1}
      ]
    }
  }
}

```