Add -tool exclusion syntax, exclude delete/restore for agents

memory_delete and memory_restore are now in memory_tools() (available
via MCP for CLI). Agent tool lists support "-tool_name" to exclude.
Agents automatically exclude memory_delete and memory_restore.

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

src/agent/oneshot.rs

@@ -421,8 +421,17 @@ pub async fn run_one_agent(
     };
 
     // Base memory tools + extras from agent def (matching unconscious.rs pattern)
+    // Tools prefixed with "-" are excluded (e.g., "-memory_delete")
     let base_tools = super::tools::memory::memory_tools().to_vec();
     let extra_tools = super::tools::memory::journal_tools().to_vec();
+
+    // Collect exclusions (tools starting with "-")
+    let mut exclusions: Vec<&str> = def.tools.iter()
+        .filter_map(|t| t.strip_prefix('-'))
+        .collect();
+    // Always exclude destructive tools from agents
+    exclusions.extend(&["memory_delete", "memory_restore"]);
+
     let mut effective_tools: Vec<super::tools::Tool> = if def.tools.is_empty() {
         let mut all = base_tools;
         all.extend(extra_tools);
@@ -430,12 +439,15 @@ pub async fn run_one_agent(
     } else {
         let mut tools = base_tools;
         for name in &def.tools {
+            if name.starts_with('-') { continue; } // skip exclusions
             if let Some(t) = extra_tools.iter().find(|t| t.name == *name) {
                 tools.push(t.clone());
             }
         }
         tools
     };
+    // Apply exclusions
+    effective_tools.retain(|t| !exclusions.contains(&t.name));
     effective_tools.push(super::tools::Tool {
         name: "output",
         description: "Produce a named output value for passing between steps.",

src/agent/tools/memory.rs

@@ -12,8 +12,8 @@ use crate::hippocampus::{access, memory_rpc, StoreAccess};
 // Re-export typed API from hippocampus for backward compatibility
 pub use crate::hippocampus::{
     memory_render, memory_write, memory_search, memory_link_set, memory_link_add,
-    memory_delete, memory_history, memory_weight_set, memory_rename, memory_supersede,
-    memory_query, memory_links,
+    memory_delete, memory_restore, memory_history, memory_weight_set, memory_rename,
+    memory_supersede, memory_query, memory_links,
     journal_tail, journal_new, journal_update,
     graph_topology, graph_health, graph_communities, graph_normalize_strengths,
     graph_link_impact, graph_hubs, graph_trace,
@@ -177,6 +177,7 @@ memory_tool!(memory_search, ref, keys: [Vec<String>], max_hops: [Option<u32>], e
 memory_tool!(memory_link_set, mut, source: [str], target: [str], strength: [f32]);
 memory_tool!(memory_link_add, mut, source: [str], target: [str]);
 memory_tool!(memory_delete, mut, key: [str]);
+memory_tool!(memory_restore, mut, key: [str]);
 memory_tool!(memory_history, ref, key: [str], full: [Option<bool>]);
 memory_tool!(memory_weight_set, mut, key: [str], weight: [f32]);
 memory_tool!(memory_rename, mut, old_key: [str], new_key: [str]);
@@ -208,7 +209,7 @@ memory_tool!(graph_trace, ref, key: [str]);
 
 // ── Definitions ────────────────────────────────────────────────
 
-pub fn memory_tools() -> [super::Tool; 18] {
+pub fn memory_tools() -> [super::Tool; 20] {
     use super::Tool;
     macro_rules! tool {
         ($name:ident, $desc:expr, $params:expr) => {
@@ -263,7 +264,16 @@ pub fn memory_tools() -> [super::Tool; 18] {
             "properties": { "source": {"type": "string"}, "target": {"type": "string"} },
             "required": ["source", "target"]
         }"#),
-        // NOTE: memory_delete not exposed to agents - use memory_supersede instead
+        tool!(memory_delete, "Soft-delete a node.", r#"{
+            "type": "object",
+            "properties": { "key": {"type": "string"} },
+            "required": ["key"]
+        }"#),
+        tool!(memory_restore, "Restore a deleted node.", r#"{
+            "type": "object",
+            "properties": { "key": {"type": "string"} },
+            "required": ["key"]
+        }"#),
         tool!(memory_history, "Show version history for a node.", r#"{
             "type": "object",
             "properties": { "key": {"type": "string"}, "full": {"type": "boolean"} },