hermes - 💡(How to fix) Fix [Feature]: Fix for: Hermes Agent Silently Drops `EmbeddedResource` Content Blocks from MCP Tool Results

# MCP SDK test confirming the block structure:
from mcp.types import EmbeddedResource, TextResourceContents

resource = TextResourceContents(
    uri="qmd://vault/test.md",
    name="test.md",
    mimeType="text/markdown",
    text="Hello from qmd!",
)
block = EmbeddedResource(type="resource", resource=resource)

hasattr(block, "text")       # False — no top-level .text
hasattr(block, "resource")   # True
block.resource.text          # "Hello from qmd!" — content is here

---

# BEFORE (broken):
parts: List[str] = []
for block in (result.content or []):
    if hasattr(block, "text") and block.text:
        parts.append(block.text)
        continue
    image_tag = _cache_mcp_image_block(block)
    if image_tag:
        parts.append(image_tag)

# AFTER (fixed):
parts: List[str] = []
for block in (result.content or []):
    # TextContent blocks carry .text directly
    if hasattr(block, "text") and block.text:
        parts.append(block.text)
        continue
    # EmbeddedResource blocks carry the payload in .resource.text
    # (MCP spec: type="resource", resource={uri, mimeType, text/blob}).
    if hasattr(block, "resource"):
        resource = block.resource
        if hasattr(resource, "text") and resource.text:
            parts.append(resource.text)
            continue
        if hasattr(resource, "blob") and resource.blob:
            pass  # handled by _cache_mcp_image_block below
    image_tag = _cache_mcp_image_block(block)
    if image_tag:
        parts.append(image_tag)

---

# BEFORE (broken):
@staticmethod
def _extract_tool_result_text(block) -> str:
    """Extract text from a ToolResultContent block."""
    if not hasattr(block, "content") or block.content is None:
        return ""
    items = block.content if isinstance(block.content, list) else [block.content]
    return "\n".join(item.text for item in items if hasattr(item, "text"))

# AFTER (fixed):
@staticmethod
def _extract_tool_result_text(block) -> str:
    """Extract text from a ToolResultContent block.
    Handles both TextContent blocks (.text) and EmbeddedResourceContent
    blocks (.resource.text) per the MCP spec.
    """
    if not hasattr(block, "content") or block.content is None:
        return ""
    items = block.content if isinstance(block.content, list) else [block.content]
    parts: List[str] = []
    for item in items:
        if hasattr(item, "text") and item.text:
            parts.append(item.text)
        elif hasattr(item, "resource"):
            resource = item.resource
            if hasattr(resource, "text") and resource.text:
                parts.append(resource.text)
    return "\n".join(parts)

---