ref(ai-agents-sdks): Remove gen_ai.operation.type and narrow operation names for requests (#16324)

Author: alexander-alderman-webb

develop-docs/sdk/telemetry/traces/modules/ai-agents.mdx

@@ -99,7 +99,7 @@ This span represents a request to an AI model or service that generates a respon
 
 - Span `op` SHOULD be `"gen_ai.{gen_ai.operation.name}"`. (e.g. `"gen_ai.chat"`)
 - Span `name` SHOULD be `{gen_ai.operation.name} {gen_ai.request.model}"`. (e.g. `"chat o3-mini"`)
-- Attribute `gen_ai.operation.name` MUST be the operation performed. **[4]** (e.g. `"chat"`.)
+- Attribute `gen_ai.operation.name` MUST be `"chat"`, `"embeddings"`, `"generate_content"` or `"text_completion"`. **[4]**
 - All [Common Span Attributes](#common-span-attributes) SHOULD be set (all `required` common attributes MUST be set).
 
 Additional attributes on the span:
@@ -199,7 +199,6 @@ Some attributes are common to all AI Agents spans:
 | Attribute               | Type   | Requirement Level | Description                                                                              | Example               |
 | :---------------------- | :----- | :---------------- | :--------------------------------------------------------------------------------------- | :-------------------- |
 | `gen_ai.operation.name` | string | required          | The name of the operation being performed. **[4]**                                       | `"chat"`              |
-| `gen_ai.operation.type` | string | optional          | Type of AI operation: `"agent"`, `"ai_client"`, `"tool"`, `"handoff"`, `"guardrail"`.    | `"agent"`             |
 | `gen_ai.request.model`  | string | required          | The name of the AI model a request is being made to.                                     | `"gpt-4o"`            |
 | `gen_ai.response.model` | string | optional          | The name of the AI model the response was created with.                                  | `"gpt-4o-2024-08-06"` |
 | `gen_ai.agent.name`     | string | optional          | The name of the agent this span belongs to.                                              | `"Weather Agent"`     |