diff --git a/CHANGELOG.md b/CHANGELOG.md
index abd095be..ac14981c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,12 +14,10 @@
   - New `citation_registry: dict[str, int]` field on `ChatSessionState`
   - New `get_or_assign_index(chunk_id)` method for stable index assignment
   - Registry serialized/restored via AG-UI state protocol
-- **Recall Tool**: Check conversation history before running research
-  - New `recall` tool on chat agent searches previous Q&A pairs by semantic similarity
-  - Uses embedding similarity matching with 0.8 cosine similarity threshold
-  - Returns previous answer with citations if found, avoiding redundant research calls
-  - Emits `StateSnapshotEvent` so frontend can display recalled citations
-  - Updated system prompt with routing guidance: use `recall` FIRST for follow-up questions
+- **Prior Answer Recall**: The `ask` tool automatically checks conversation history before research
+  - Finds semantically similar prior answers using embedding similarity (0.7 cosine threshold)
+  - Relevant prior answers are passed to the research planner as context
+  - Planner can return empty sub_questions when context is sufficient, avoiding redundant searches
 - **Dynamic Session Context**: Compressed conversation history for multi-turn chat
   - New `SessionContext` model stores summarized conversation state instead of raw Q&A history
   - Background LLM-based summarization runs after each `ask` tool call (non-blocking)
@@ -27,7 +25,6 @@
   - Research graph receives compact context (~1,000-2,000 tokens) instead of raw qa_history (potentially thousands of tokens)
   - New `session_context` field on `ChatSessionState` synced via AG-UI state protocol
   - Chat TUI: New context modal (`Ctrl+O`) to view current session context
-  - Planner can now return empty sub_questions when context is sufficient to answer directly
 - **Session Document Filter**: Restrict all search/ask operations to selected documents
   - New `document_filter` field on `ChatSessionState` stores list of document titles/URIs
   - Session filter combines with per-tool `document_name` filter using AND logic
@@ -49,9 +46,9 @@
 
 ### Removed
 
-- **Q&A History Functions**: Removed unused conversation history utilities
-  - `rank_qa_history_by_similarity()` - chat agent now uses `SessionContext` instead of ranked Q&A pairs
-  - `format_conversation_context()` - no longer needed with SessionContext approach
+- **Q&A History Functions**: Removed standalone conversation history utilities
+  - `rank_qa_history_by_similarity()` - similarity matching now integrated into `ask` tool
+  - `format_conversation_context()` - replaced by `SessionContext` summarization
   - Associated embedding cache and helper functions also removed
 
 ## [0.26.9] - 2026-01-22
diff --git a/docs/agents.md b/docs/agents.md
index 3e516eef..6409a302 100644
--- a/docs/agents.md
+++ b/docs/agents.md
@@ -61,14 +61,13 @@ Key features:
 
 ### Tools
 
-The chat agent uses four tools:
+The chat agent uses three tools:
 
-- `recall` — Search conversation history for previous answers (use FIRST for follow-up questions)
 - `search` — Hybrid search with optional document filter
-- `ask` — Answer questions using the conversational research graph
+- `ask` — Answer questions using the conversational research graph (automatically recalls prior answers)
 - `get_document` — Retrieve a specific document by title or URI
 
-The `recall` tool uses embedding similarity to find semantically matching questions from conversation history. If a match is found (above 0.8 cosine similarity threshold), it returns the previous answer with citations, avoiding redundant research calls.
+The `ask` tool automatically checks conversation history before running research. It uses embedding similarity (0.7 cosine threshold) to find semantically matching prior answers, which are passed to the research planner as context. When prior answers are sufficient, the planner can skip searching entirely.
 
 ### CLI Usage