chore: Apply suggestions from gemini code review

minor documentation nits

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: drstrangelooker

docs/en/integrations/looker/tools/looker-create-agent.md

@@ -1,5 +1,5 @@
 ---
-title: "looker-create-agent"
+title: "looker-create-agent Tool"
 type: docs
 weight: 1
 description: >

docs/en/integrations/looker/tools/looker-delete-agent.md

@@ -1,5 +1,5 @@
 ---
-title: "looker-delete-agent"
+title: "looker-delete-agent Tool"
 type: docs
 weight: 1
 description: >

docs/en/integrations/looker/tools/looker-get-agent.md

@@ -1,5 +1,5 @@
 ---
-title: "looker-get-agent"
+title: "looker-get-agent Tool"
 type: docs
 weight: 1
 description: >

docs/en/integrations/looker/tools/looker-list-agents.md

@@ -1,5 +1,5 @@
 ---
-title: "looker-list-agents"
+title: "looker-list-agents Tool"
 type: docs
 weight: 1
 description: >

docs/en/integrations/looker/tools/looker-update-agent.md

@@ -46,6 +46,6 @@ description: |
 
 | **field**   | **type** | **required** | **description**                                    |
 |-------------|:--------:|:------------:|----------------------------------------------------|
-| type        |  string  |     true     | Must be "looker-update-agents".                    |
+| type        |  string  |     true     | Must be "looker-update-agent".                     |
 | source      |  string  |     true     | Name of the Looker source.                         |
 | description |  string  |     true     | Description of the tool that is passed to the LLM. |