refactor(subagent): shorten model-selection tool descriptions

snapshots/web/optional-string-editor/system-prompt.expected.md

@@ -158,11 +158,11 @@ interface ToolArgsMap {
     /** children (default) lists direct children, which accept send_message in any status. descendants lists the whole tree below you with each entry's parent session id and depth; entries deeper than 1 accept only interrupt_agent. */
     scope?: "children" | "descendants";
   } & Record<string, JsonValue>;
-  /** Discover LLM routes for subagents without changing the current Agent. Call with no arguments to list registered providers, with `provider` to list its allowed models, or with `provider` and `model` to inspect that exact model and its reasoning efforts. Catalog membership is advisory: an adapter may accept an unlisted model id. Use the returned ids with a delegation tool's `provider`, `model`, and `reasoning_effort` fields. */
+  /** Inspect subagent models without changing the current Agent. No arguments: providers; `provider`: allowed models; `provider` + `model`: that model and its reasoning efforts. Use returned ids for delegation. */
   list_subagent_models: {
-    /** Registered LLM provider id. Omit to list providers. */
+    /** Registered LLM provider id. */
     provider?: string;
-    /** Exact model id to inspect. Requires provider; omit to list that provider's allowed models. */
+    /** Exact model id; requires provider. */
     model?: string;
   } & Record<string, JsonValue>;
   /** Declare existing files as final deliverables for the user. Use it when the user needs a separate file, especially Office documents, spreadsheets, and slide decks; prefer your final response when that suffices. The user opens the current files; their contents are not copied. */
@@ -305,7 +305,7 @@ interface ToolArgsMap {
     /** Optional parameter of `view` command when `path` points to a file. If omitted or null, the full file is shown. If provided, the file will be shown in the indicated line number range, e.g. [11, 12] will show lines 11 and 12. Indexing at 1 to start. Setting `[start_line, -1]` shows all lines from `start_line` to the end of the file. */
     view_range?: number[] | null;
   } & Record<string, JsonValue>;
-  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. This tool starts an independently managed subagent and immediately returns its id. The runtime notifies you when it finishes. The child reports results with `send_message`; use `send_message` to steer it while running or continue its conversation after it finishes. Child LLM selection is optional. Omit `provider`, `model`, and `reasoning_effort` to use configured child defaults and inherit compatible missing values from the parent Agent. Supply `provider` and `model` together after using `list_subagent_models` to inspect advertised routes and efforts. Changing the effective route without naming an effort uses the selected model's default effort. */
+  /** Delegate a self-contained task to a subagent (a separate agent that works in its own context) to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent returns its result, not its intermediate steps. This tool starts an independently managed subagent and immediately returns its id. The runtime notifies you when it finishes. The child reports results with `send_message`; use `send_message` to steer it while running or continue its conversation after it finishes. Inspect options with `list_subagent_models` before setting `provider` and `model` together. Omitted values use child defaults, falling back to compatible parent values. When the effective route changes, an omitted `reasoning_effort` uses the model's default. */
   subagent: {
     /** Initial child working directory. Relative paths use your current directory; omitted inherits it. Later directory changes in either agent are independent. */
     cwd?: string;
@@ -313,11 +313,11 @@ interface ToolArgsMap {
     description: string;
     /** The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs. */
     prompt: string;
-    /** LLM provider route for the child. Supply together with model; omit both to use configured child defaults or inherit the parent route. */
+    /** Child LLM provider id. */
     provider?: string;
-    /** Model id interpreted by provider. Supply together with provider; omit both to use configured child defaults or inherit the parent route. */
+    /** Model id within that provider. */
     model?: string;
-    /** Adapter-owned reasoning effort for the effective child route. Omit to inherit a compatible configured/parent effort or use a newly selected model's default. */
+    /** Model-specific reasoning effort id. */
     reasoning_effort?: string;
   } & Record<string, JsonValue>;
   /** Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn). Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive its result, not its intermediate steps. This tool starts an independently managed subagent and immediately returns its id. The runtime notifies you when it finishes. The child reports results with `send_message`; use `send_message` to steer it while running or continue its conversation after it finishes. */