feat: allow tool_call to be object for granular capabilities

- Update schema to accept boolean OR object for tool_call
- Add streaming, parallel, and coerces_types optional fields
- Update meta.llama3-3-70b-instruct-v1:0 as example
- Documents Bedrock streaming limitation and type coercion

Default semantics (do the least harm):
- streaming: undefined → true (matches current tool_call=true assumption)
- parallel: undefined → false (safer, not universally supported)
- coerces_types: undefined → false (most models work correctly)

Addresses provider-specific tool calling limitations:
- Streaming incompatibility (AWS Bedrock non-Anthropic models)
- Type coercion issues (Bedrock integer handling)
- Parallel tool calling tracking (addresses #202)

Evidence:
- AWS re:Post: streaming errors, integer coercion
- langchain-aws #140, #354: streaming validation issues
- pydantic-ai #1649: response format problems
- req_llm: agentjido/req_llm#163

100% backward compatible at TOML level - existing tool_call = true/false still valid

Author: neilberkman

packages/core/src/schema.ts

@@ -7,7 +7,21 @@ export const Model = z
     attachment: z.boolean(),
     reasoning: z.boolean(),
     temperature: z.boolean(),
-    tool_call: z.boolean(),
+    tool_call: z
+      .union([
+        z.boolean(),
+        z
+          .object({
+            supported: z.boolean(),
+            streaming: z.boolean().optional(),
+            parallel: z.boolean().optional(),
+            coerces_types: z.boolean().optional(),
+          })
+          .strict(),
+      ])
+      .describe(
+        "Supports tool calling. Can be a boolean or an object for granular capabilities.",
+      ),
     knowledge: z
       .string()
       .regex(/^\d{4}-\d{2}(-\d{2})?$/, {
@@ -71,7 +85,7 @@ export const Model = z
     {
       message: "Cannot set cost.reasoning when reasoning is false",
       path: ["cost", "reasoning"],
-    }
+    },
   );
 
 export type Model = z.infer<typeof Model>;
@@ -87,7 +101,7 @@ export const Provider = z
       .string()
       .min(
         1,
-        "Please provide a link to the provider documentation where models are listed"
+        "Please provide a link to the provider documentation where models are listed",
       ),
     models: z.record(Model),
   })
@@ -103,6 +117,6 @@ export const Provider = z
       message:
         "'api' field is required if and only if npm is '@ai-sdk/openai-compatible'",
       path: ["api"],
-    }
+    },
   );
 export type Provider = z.infer<typeof Provider>;

providers/amazon-bedrock/models/meta.llama3-3-70b-instruct-v1:0.toml

@@ -5,9 +5,13 @@ attachment = false
 reasoning = false
 temperature = true
 knowledge = "2023-12"
-tool_call = true
 open_weights = true
 
+[tool_call]
+supported = true
+streaming = false
+coerces_types = true
+
 [cost]
 input = 0.72
 output = 0.72