diff --git a/agent/build_runtime.go b/agent/build_runtime.go
index 676845a..0830b40 100644
--- a/agent/build_runtime.go
+++ b/agent/build_runtime.go
@@ -139,7 +139,8 @@ func BuildRuntime(cfg *AgentConfig, srv toolsrv.Runner, cwd string, env []string
 		}
 	}
 
-	// Append compact tool surface listing (name + description).
+	// Append compact tool surface listing (name + description) plus
+	// full documentation for loaded tools (schema, args, examples).
 	var toolListing strings.Builder
 	for _, ti := range allToolInfos {
 		if ti.Description != "" && ti.Server == "" {
@@ -149,6 +150,21 @@ func BuildRuntime(cfg *AgentConfig, srv toolsrv.Runner, cwd string, env []string
 	if toolListing.Len() > 0 {
 		preamble += "\n# Available Tools\n\n" + toolListing.String()
 	}
+	// Inject full tool prompts so models that ignore native tool schemas
+	// still see usage docs, arg definitions, and examples in-context.
+	var toolDocs strings.Builder
+	for _, ti := range allToolInfos {
+		if ti.Prompt != "" && ti.Server == "" {
+			toolDocs.WriteString(ti.Prompt)
+			toolDocs.WriteString("\n\n")
+			if len(ti.InputSchema) > 0 && string(ti.InputSchema) != "{}" {
+				fmt.Fprintf(&toolDocs, "**Schema**:\n```json\n%s\n```\n\n", ti.InputSchema)
+			}
+		}
+	}
+	if toolDocs.Len() > 0 {
+		preamble += "\n# Tool Documentation\n\n" + toolDocs.String()
+	}
 
 	// Append 9P discovery instructions for loading additional tools.
 	preamble += "\n## Tool discovery\n\nUse the 9P filesystem to discover and load tools dynamically:\n- **List available tools** — `ollie-9p read session/{id}/agent/{aid}/tools`\n- **Load a tool** — `echo \"toolname\" | ollie-9p write session/{id}/agent/{aid}/tools`\n- **See loaded tools** — `ollie-9p read session/{id}/agent/{aid}/tools.loaded`\n"