Optimize MCP tool token usage with schema reference pattern

Reduces MCP tool token consumption by ~90% through progressive disclosure. Tools now show minimal schemas with get_schema() for details on demand.

plugin/skills/mem-search/SKILL.md

@@ -212,3 +212,118 @@ help(topic="all")  # Get complete guide
 - ALWAYS get timeline context to understand what was happening
 - ALWAYS use `get_observations` when fetching 2+ observations
 - The workflow is optimized: search → timeline → batch fetch = 10-100x faster
+
+---
+
+## Tool Reference
+
+Comprehensive parameter documentation for all memory tools. For MCP usage, call `help(topic="search")` to load specific tool docs.
+
+### search
+
+Search across all memory types (observations, sessions, prompts).
+
+**Parameters:**
+
+- `query` (string, optional) - Search term for full-text search
+- `limit` (number, optional) - Maximum results to return. Default: 20, Max: 100
+- `offset` (number, optional) - Number of results to skip. Default: 0
+- `project` (string, required) - Project name to filter by
+- `type` (string, optional) - Filter by type: "observations", "sessions", "prompts"
+- `dateStart` (string, optional) - Start date filter (YYYY-MM-DD or epoch ms)
+- `dateEnd` (string, optional) - End date filter (YYYY-MM-DD or epoch ms)
+- `obs_type` (string, optional) - Filter observations by type (comma-separated): bugfix, feature, decision, discovery, change
+- `orderBy` (string, optional) - Sort order: "date_desc" (default), "date_asc", "relevance"
+
+**Returns:** Table of results with IDs, timestamps, types, titles
+
+### timeline
+
+Get chronological context around a specific point in time or observation.
+
+**Parameters:**
+
+- `anchor` (number, optional) - Observation ID to center timeline around. If not provided, uses most recent result from query
+- `query` (string, optional) - Search term to find anchor automatically (if anchor not provided)
+- `depth_before` (number, optional) - Items before anchor. Default: 5, Max: 20
+- `depth_after` (number, optional) - Items after anchor. Default: 5, Max: 20
+- `project` (string, required) - Project name to filter by
+
+**Returns:** Exactly `depth_before + 1 + depth_after` items in chronological order, with observations, sessions, and prompts interleaved
+
+### get_recent_context
+
+Get the most recent observations from current or recent sessions.
+
+**Parameters:**
+
+- `limit` (number, optional) - Maximum observations to return. Default: 10, Max: 50
+- `project` (string, required) - Project name to filter by
+
+**Returns:** Recent observations in reverse chronological order
+
+### get_context_timeline
+
+Get timeline context around a specific observation ID.
+
+**Parameters:**
+
+- `anchor` (number, required) - Observation ID to center timeline around
+- `depth_before` (number, optional) - Items before anchor. Default: 5, Max: 20
+- `depth_after` (number, optional) - Items after anchor. Default: 5, Max: 20
+- `project` (string, optional) - Project name to filter by
+
+**Returns:** Timeline items centered on the anchor observation
+
+### get_observation
+
+Fetch a single observation by ID with full details.
+
+**Parameters:**
+
+- `id` (number, required) - Observation ID to fetch
+
+**Returns:** Complete observation object with title, subtitle, narrative, facts, concepts, files, timestamps
+
+### get_observations
+
+Batch fetch multiple observations by IDs. Always prefer this over individual fetches for 2+ observations.
+
+**Parameters:**
+
+- `ids` (array of numbers, required) - Array of observation IDs to fetch
+- `orderBy` (string, optional) - Sort order: "date_desc" (default), "date_asc"
+- `limit` (number, optional) - Maximum observations to return. Default: no limit
+- `project` (string, optional) - Project name to filter by
+
+**Returns:** Array of complete observation objects, 10-100x faster than individual fetches
+
+### get_session
+
+Fetch a single session by ID with metadata.
+
+**Parameters:**
+
+- `id` (number, required) - Session ID to fetch (just the number, not "S2005" format)
+
+**Returns:** Session object with ID, start time, end time, project, model info
+
+### get_prompt
+
+Fetch a single prompt by ID with full text.
+
+**Parameters:**
+
+- `id` (number, required) - Prompt ID to fetch
+
+**Returns:** Prompt object with ID, text, timestamp, session reference
+
+### help
+
+Load detailed instructions for specific topics or all documentation.
+
+**Parameters:**
+
+- `topic` (string, optional) - Specific topic to load: "workflow", "search", "timeline", "get_recent_context", "get_context_timeline", "get_observation", "get_observations", "get_session", "get_prompt", "all". Default: "all"
+
+**Returns:** Formatted documentation for the requested topic