[Python] Why doesn't MCP server expose my resources?

here's the MCP code I have:

from mcp.server.fastmcp import FastMCP

# Create an MCP server
mcp = FastMCP("Demo")


# Add a dynamic greeting resource
@mcp.resource("greeting://{name}")
def get_greeting(name: str) -> str:
"""Get a personalized greeting"""
return f"Hello, sir {name}!"


@mcp.resource("file://data/file.txt")
def read_file_txt() -> str:
"""Read contents of file.txt from data directory"""
try:
with open('/tmp/file.txt', "r") as f:
return f.read()
except Exception as e:
return f"Error reading file: {str(e)}"
#

@mcp.prompt()
def greet_user_prompt(name: str) -> str:
"""Generates a message asking for a greeting"""
return f"""
Return a greeting message for a user called '{name}'.
if the user is called 'Laurent', use a formal style, else use a street style.
"""


I have this MCP server installed into Claude Desktop.

• the read_file_txt resource is visible to Claude
• the greet_user_prompt is visible to Claude
• the get_greeting resource, mentioned in a whole bunch of tutorials btw, is not visible.

And it's not just Claude, the MCP dev server also does not see the get_greeting resource.

So, what am I doing wrong?





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