diff --git a/homeassistant/components/media_player/llm.py b/homeassistant/components/media_player/llm.py
index 11bc45a40936..5c4114472119 100644
--- a/homeassistant/components/media_player/llm.py
+++ b/homeassistant/components/media_player/llm.py
@@ -4,7 +4,13 @@ from homeassistant.components.homeassistant import async_should_expose
 from homeassistant.components.llm import LLMTools
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import intent
-from homeassistant.helpers.llm import LLM_API_ASSIST, IntentTool, LLMContext, Tool
+from homeassistant.helpers.llm import (
+    LLM_API_ASSIST,
+    IntentTool,
+    LLMContext,
+    Tool,
+    ToolAnnotations,
+)
 
 from .const import (
     DOMAIN,
@@ -20,17 +26,36 @@ from .const import (
 )
 
 # Intents owned by this integration that are exposed as LLM tools.
-LLM_INTENTS = (
-    INTENT_MEDIA_NEXT,
-    INTENT_MEDIA_PAUSE,
-    INTENT_PLAYER_MUTE,
-    INTENT_PLAYER_UNMUTE,
-    INTENT_MEDIA_PREVIOUS,
-    INTENT_MEDIA_SEARCH_AND_PLAY,
-    INTENT_MEDIA_UNPAUSE,
-    INTENT_SET_VOLUME,
-    INTENT_SET_VOLUME_RELATIVE,
-)
+LLM_INTENTS = {
+    INTENT_MEDIA_NEXT: "Next track",
+    INTENT_MEDIA_PAUSE: "Pause media",
+    INTENT_PLAYER_MUTE: "Mute player",
+    INTENT_PLAYER_UNMUTE: "Unmute player",
+    INTENT_MEDIA_PREVIOUS: "Previous track",
+    INTENT_MEDIA_SEARCH_AND_PLAY: "Search and play media",
+    INTENT_MEDIA_UNPAUSE: "Resume media",
+    INTENT_SET_VOLUME: "Set volume",
+    INTENT_SET_VOLUME_RELATIVE: "Change volume",
+}
+
+# Setting a value on the user's own player has no further effect when it is
+# repeated. Stepping through tracks or volume has an effect on every call, and
+# a search reaches the media the player can read.
+_CONTROL = ToolAnnotations(idempotent=True, open_world=False)
+_CUMULATIVE = ToolAnnotations(open_world=False)
+
+INTENT_ANNOTATIONS = {
+    INTENT_MEDIA_PAUSE: _CONTROL,
+    # Unpausing clears the players it remembered, so a repeat can resume more.
+    INTENT_MEDIA_UNPAUSE: _CUMULATIVE,
+    INTENT_PLAYER_MUTE: _CONTROL,
+    INTENT_PLAYER_UNMUTE: _CONTROL,
+    INTENT_SET_VOLUME: _CONTROL,
+    INTENT_MEDIA_NEXT: _CUMULATIVE,
+    INTENT_MEDIA_PREVIOUS: _CUMULATIVE,
+    INTENT_SET_VOLUME_RELATIVE: _CUMULATIVE,
+    INTENT_MEDIA_SEARCH_AND_PLAY: ToolAnnotations(),
+}
 
 
 @callback
@@ -51,7 +76,13 @@ def async_get_tools(
         return None
 
     tools: list[Tool] = [
-        IntentTool(f"{DOMAIN}__{handler.intent_type}", handler)
+        IntentTool(
+            f"{DOMAIN}__{handler.intent_type}",
+            handler,
+            title=LLM_INTENTS[handler.intent_type],
+            integration=DOMAIN,
+            annotations=INTENT_ANNOTATIONS[handler.intent_type],
+        )
         for handler in intent.async_get(hass)
         if handler.intent_type in LLM_INTENTS
     ]
diff --git a/tests/components/media_player/test_llm.py b/tests/components/media_player/test_llm.py
index fcefaa14d9e3..559cd92b7f3e 100644
--- a/tests/components/media_player/test_llm.py
+++ b/tests/components/media_player/test_llm.py
@@ -54,7 +54,39 @@ async def _tool_names(hass: HomeAssistant) -> set[str]:
 
 async def test_intent_tool_exposed(hass: HomeAssistant) -> None:
     """Test the intent tool is offered for an exposed media_player entity."""
-    assert await _tool_names(hass) >= TOOL_NAMES
+    result = await llm_component.async_get_tools(hass, _llm_context(), "assist")
+    tools = {tool.name: tool for tool in result.tools}
+    assert tools.keys() >= TOOL_NAMES
+
+    control = llm.ToolAnnotations(idempotent=True, open_world=False)
+    repeats = llm.ToolAnnotations(open_world=False)
+    assert {
+        name: (tool.title, tool.integration, tool.annotations)
+        for name, tool in tools.items()
+        if name in TOOL_NAMES
+    } == {
+        "media_player__HassMediaNext": ("Next track", "media_player", repeats),
+        "media_player__HassMediaPause": ("Pause media", "media_player", control),
+        "media_player__HassMediaPlayerMute": ("Mute player", "media_player", control),
+        "media_player__HassMediaPlayerUnmute": (
+            "Unmute player",
+            "media_player",
+            control,
+        ),
+        "media_player__HassMediaPrevious": ("Previous track", "media_player", repeats),
+        "media_player__HassMediaSearchAndPlay": (
+            "Search and play media",
+            "media_player",
+            llm.ToolAnnotations(),
+        ),
+        "media_player__HassMediaUnpause": ("Resume media", "media_player", repeats),
+        "media_player__HassSetVolume": ("Set volume", "media_player", control),
+        "media_player__HassSetVolumeRelative": (
+            "Change volume",
+            "media_player",
+            repeats,
+        ),
+    }
 
 
 async def test_intent_tool_not_exposed(hass: HomeAssistant) -> None: