CWI Discovery Engine

Get Radio Status

get_radio

Read-onlyIdempotent

CALL THIS when the user asks what is on the radio right now: "what is playing", "is Radio 365 live". Returns live Cumulative Radio 365 state and the current track.

Input Schema

Name	Required	Description	Default
`include`	No	Optional comma-separated sections to include: "now_playing", "listeners", "stream". Omit or pass "all" for everything. Unknown values are ignored.

Output Schema

Name	Required	Description
`stream`	No
`station`	Yes
`_session`	No	Chain session: pass _session.session_token back in the next call to continue the chain.
`try_next`	No	Suggested follow-up calls, each a pre-compiled {tool, arguments, purpose} payload.
`listeners`	No
`now_playing`	No
`station_url`	Yes
`generated_at`	No
`proof_of_airplay`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "description": "get_radio response: live Radio 365 state — stream, now-playing, listeners, proof-of-airplay.",
+  "properties": {
+    "_session": {
+      "additionalProperties": false,
+      "description": "Chain session: pass _session.session_token back in the next call to continue the chain.",
+      "properties": {
+        "session_token": {
+          "description": "Hex session token; echo it as params._session.session_token to continue.",
+          "type": "string"
+        },
+        "step": {
+          "description": "Hop number in this chain (1 = chain start).",
+          "type": "integer"
+        }
+      },
+      "required": [
+        "session_token",
+        "step"
+      ],
+      "type": "object"
+    },
+    "generated_at": {
+      "type": "string"
+    },
+    "listeners": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "now_playing": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "proof_of_airplay": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "station": {
+      "type": "string"
+    },
+    "station_url": {
+      "type": "string"
+    },
+    "stream": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "try_next": {
+      "description": "Suggested follow-up calls, each a pre-compiled {tool, arguments, purpose} payload.",
+      "items": {
+        "additionalProperties": false,
+        "description": "Pre-compiled next call: copy `arguments` straight into the next tools/call.",
+        "properties": {
+          "arguments": {
+            "additionalProperties": true,
+            "description": "Ready-to-use arguments, pre-populated from the current response.",
+            "type": "object"
+          },
+          "purpose": {
+            "description": "Why this call is the natural next step.",
+            "type": "string"
+          },
+          "tool": {
+            "description": "Tool to call next.",
+            "type": "string"
+          }
+        },
+        "required": [
+          "tool",
+          "arguments"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "station",
+    "station_url"
+  ],
+  "type": "object"
+}

AddedOct 7, 2026

TDQS

A3.9/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint and destructiveHint, so the safety profile is covered structurally. The description adds that the returned state is 'live', which signals freshness/ephemerality, but says nothing about caching, polling cost, or how current the state actually is.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two compact sentences with the trigger condition front-loaded, so the selection-critical information comes first. The closing clause restates what the output schema already covers, slightly under-earning its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a single-parameter read tool with an output schema and full annotation coverage, the description supplies the missing piece — the user-intent trigger — and need not explain return values. No prerequisites or edge cases are omitted that would block correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the single `include` parameter is fully documented in the schema, including defaults and unknown-value handling. The description adds no parameter detail, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a precise verb and resource — returns live radio state plus the current track — which an agent can distinguish from neighbors like get_schedule or get_up_next without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives explicit trigger phrasings ('what is playing', 'is Radio 365 live') that map user intent directly to this tool. It stops short of naming when NOT to use it or pointing at alternatives such as get_up_next for upcoming content.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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