refactor: update descriptions for resource creation and manifest application in K8s tool

[abhinav-1305]

Resolves: #454

[EdmondDantes21]

Two more lines should be changed in this PR at the functions' definitions, i.e. at def _apply_manifest and def create_resource. I may have made some mistakes, but this PR does not solve the issue for me without these two further adjustments.

[EItanya]

Two more lines should be changed in this PR at the functions' definitions, i.e. at def _apply_manifest and def create_resource. I may have made some mistakes, but this PR does not solve the issue for me without these two further adjustments.

Can you explain in more detail what you mean?

[EdmondDantes21]

Sure, apologies for being so vague.

Currently, the function's signature looks like this:

def _create_resource(
    resource_yaml: Annotated[str, "The YAML definition of the resource to create. Must be a local file"],
    namespace: Annotated[Optional[str], "The namespace of the resource to create"] = None,
) -> str:

The agent still refuses to comply due to that 'Must be a local file'. The same applies to the apply_manifest function.
Btw, are you planning to get rid of built in tools?

[EItanya]

That makes sense, I agree that this probably doesn't fully fix the issue, and yes we are planning to get rid of these built-ins so I don't think it's worth putting too much work into them right now.