docs: improve metadata description verbiage

The text as written is ambiguous about if the directives _only_ tag things with Crypto or with the icon,
and it's not until the reader scrolls down that they might figure out the reference is to the example below.
Adding this small bit of text directs them to the example early on and adds clarity.

Signed-off-by: Nick Hale <[email protected]>
Co-authored-by: Adrian Goins <[email protected]>

Author: njhale

README.md

@@ -86,10 +86,10 @@ Param: algo: The algorithm to generate a hash with. Default is "sha256". Support
 
 ## Tool Metadata
 
-The `tool.gpt` file also provides the following metadata for use in Obot:
+The snippet below (from the `tool.gpt` file) also provides the following metadata for use in Obot:
 
-- `!metadata:*:category` which tags tools with the `Crypto` category to promote organization and discovery
-- `!metadata:*:icon` which assigns `https://cdn.jsdelivr.net/npm/@phosphor-icons/core@2/assets/duotone/fingerprint-duotone.svg` as the tool icon
+- `!metadata:*:category` which tags all tools in the `tool.gpt` file with the `Crypto` category to promote organization and discovery
+- `!metadata:*:icon` which assigns `https://cdn.jsdelivr.net/npm/@phosphor-icons/core@2/assets/duotone/fingerprint-duotone.svg` as the tool icon to all tools in the `tool.gpt` file
 
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